58 Airworthiness Directives: 45 airplane, 9 rotorcraft, 1 engine, 3 glider.
AD 98-05-04 · published Mar 3, 1998, effective Apr 17, 1998
American Champion Aircraft Corp. Model 8GCBC Airplanes
This amendment supersedes Airworthiness Directive (AD) 87-18- 09, which currently requires inspecting (one-time) the sides of the front and rear wood spars for compression cracks on certain American Champion Aircraft Corp. (ACAC) Model 8GCBC airplanes, and repairing or replacing any wood spar with compression cracks. This AD requires repetitively inspecting the front and rear wood spars for damage, including installing any necessary inspection holes; and repairing or replacing any damaged wood spar. Damage is defined as cracks; compression cracks; longitudinal cracks through the bolt holes or nail holes; or loose or missing nails. This AD results from in-flight wing structural failure on one of the affected airplanes that was in compliance with the one-time inspection requirement of AD 87-18-09, plus 4 other ACAC Model 8GCBC accidents and 11 service difficulty reports (SDR's) of compression cracked spars. The actions specified by this AD are intended to detect compression cracks and other damage in the wood spar wing, which, if not corrected, could eventually result in in-flight structural failure of the wing with consequent loss of the airplane.
AD 98-05-06 · published Mar 3, 1998, effective May 29, 1998
Pilatus Aircraft Ltd. Model PC-12 Airplanes
This amendment adopts a new airworthiness directive (AD) that applies to certain Pilatus Aircraft Ltd. (Pilatus) Model PC-12 airplanes. This AD requires inspecting the elevator for incorrect rivet lengths and installing new rivets if incorrect rivet lengths are found. This AD also requires inspecting the elevator to assure that an excessive gap (more than .004 inches or .1 millimeters (mm)) does not exist in the rivet shanks, and installing a shim between the rib and skin to fill any excessive gap. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Switzerland. The actions specified in this AD are intended to prevent fatigue damage to the elevator, which could result in structural failure and eventual loss of control of the airplane.
AD 98-05-12 · published Mar 4, 1998, effective Apr 8, 1998
British Aerospace Model ATP Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all British Aerospace Model ATP airplanes, that requires revising the Airplane Flight Manual (AFM) to modify the limitation that prohibits positioning the power levers below the flight idle stop during flight, and to provide a statement of the consequences of positioning the power levers below the flight idle stop during flight. This amendment is prompted by incidents and accidents involving airplanes equipped with turboprop engines in which the ground propeller beta range was used improperly during flight. The actions specified by this AD are intended to prevent loss of airplane controllability, or engine overspeed and consequent loss of engine power caused by the power levers being positioned below the flight idle stop while the airplane is in flight.
AD 98-05-14 · published Mar 4, 1998, effective Apr 30, 1998
Cessna Aircraft Company Models T210N, P210N, and P210R Airplanes
This amendment adopts a new airworthiness directive (AD) that applies to Cessna Aircraft Company Models T210N, P210N, and P210R airplanes. This action requires revising the FAA-approved Airplane Flight Manual (AFM) to specify procedures that would prohibit flight in severe icing conditions (as determined by certain visual cues), limit or prohibit the use of various flight control devices while in severe icing conditions, and provide the flight crew with recognition cues for, and procedures for exiting from, severe icing conditions. This AD is prompted by the results of a review of the requirements for certification of these airplanes in icing conditions, new information on the icing environment, and icing data provided currently to the flight crew. The actions specified by this AD are intended to minimize the potential hazards associated with operating these airplanes in severe icing conditions by providing more clearly defined procedures and limitations associated with such conditions.
AD 98-05-15 · published Mar 4, 1998, effective Apr 30, 1998
SIAI Marchetti, S.r.1 Models SF600 and SF600A Airplanes
This amendment adopts a new airworthiness directive (AD) that applies to SIAI Marchetti, S.r.1 Models SF600 and SF600A airplanes. This action requires revising the FAA-approved Airplane Flight Manual (AFM) to specify procedures that would prohibit flight in severe icing conditions (as determined by certain visual cues), limit or prohibit the use of various flight control devices while in severe icing conditions, and provide the flight crew with recognition cues for, and procedures for exiting from, severe icing conditions. This AD is prompted by the results of a review of the requirements for certification of these airplanes in icing conditions, new information on the icing environment, and icing data provided currently to the flight crew. The actions specified by this AD are intended to minimize the potential hazards associated with operating these airplanes in severe icing conditions by providing more clearly defined procedures and limitations associated with such conditions.
AD 98-05-07 · published Mar 6, 1998, effective Apr 10, 1998
British Aerospace (Jetstream) Model 4101 Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain British Aerospace (Jetstream) Model 4101 airplanes, that requires replacement of the stringer joint pieces at the left side of the fuselage with new, improved parts. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent the fuselage structure at the stringer joint at station 130 on the left side of the airplane from cracking, which could result in rapid decompression of the airplane at the forward fuselage area.
AD 98-05-08 · published Mar 6, 1998, effective Apr 10, 1998
Dornier Model 328-100 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Dornier Model 328-100 series airplanes, that requires replacement of electrical relays 15KF and 16KF, which control the auxiliary propeller control feathering system, with relays having increased load capacity. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent failure of the auxiliary propeller control feathering system, which, in the event of an engine failure combined with failure of the primary propeller pitch control, could result in the inability to feather the propeller, and consequent reduced controllability of the airplane.
AD 98-05-09 · published Mar 6, 1998, effective Apr 10, 1998
Israel Aircraft Industries (IAI), Ltd., Model 1121, 1121A, 1121B, 1123, 1124, and 1124A Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all IAI, Ltd., Model 1121, 1121A, 1121B, 1123, 1124, and 1124A series airplanes, that requires repetitive inspections of the trim actuator of the horizontal stabilizer to verify jackscrew integrity and to detect excessive wear of the tie rod, and replacement of the actuator or tie rod, if necessary. This amendment is prompted by issuance of mandatory continued airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to ensure that the trim actuator of the horizontal stabilizer operates properly; failure of the actuator to operate properly could result in reduced controllability of the airplane.
AD 98-05-11 · published Mar 6, 1998, effective Mar 23, 1998
Bombardier Model CL-215-6B11 (CL-215T) Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all Bombardier Model CL-215-6B11 (CL-215T) series airplanes. This action requires either replacement of the switching valve-to-rear inlet case sealing air tube assembly with a tube assembly that includes an integral fire detector (intercompressor case [ICC] fire detector loop), and modification of the nacelle fire detection system; or modification of the No. 5 bearing air system. This amendment is prompted by the issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to detect internal engine fire within the ICC; or to prevent air/oil from leaking into the ICC, which could result in such fire.
AD 98-05-13 · published Mar 6, 1998, effective Apr 10, 1998
Airbus Model A310 and A300-600 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all Airbus Model A310 and A300-600 series airplanes, that requires a one-time visual inspection to determine the accuracy of the outer placards of the static ports. This amendment also requires a one- time inspection to detect crossed connections of the air data static system and the static probe heating system, and correction of any discrepancies. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent erroneous display of altitude information to the flight crew, and consequent reduced operational safety during all phases of flight.
AD 98-05-16 · published Mar 6, 1998, effective Apr 10, 1998
Raytheon Model DH 125-1A and -3A Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Raytheon Model DH 125-1A and -3A series airplanes, that requires repetitive eddy current inspections to detect fatigue cracking of the main entry door/frame pressing, and repair, if necessary. This amendment is prompted by reports of fatigue cracking of the main entry door/frame pressing due to cyclic loading of the door frame. The actions specified by this AD are intended to detect and correct such fatigue cracking, which could lead to the loss of structural integrity of the main entry door, and, consequently, result in decompression of the cabin.
AD 98-06-01 · published Mar 11, 1998, effective Apr 15, 1998
Dassault Model Mystere-Falcon 50 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all Dassault Model Mystere-Falcon 50 series airplanes, that requires a one-time inspection of the clearances around the wiring harnesses of the right-hand electrical cabinet, and readjustment of the clearances, if necessary. This amendment will also require installation of protective strips on the wiring harnesses and equipment supports. This amendment is prompted by issuance of mandatory continued airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent interference between the wiring harnesses and adjacent equipment, support brackets, and structural elements, which could cause an electrical short circuit resulting in fire, and consequent loss of electrical power to essential flight systems.
AD 98-06-02 · published Mar 11, 1998, effective Apr 15, 1998
Construcciones Aeronauticas, S.A. (CASA) Model C-212 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain CASA Model C-212 series airplanes, that requires a one-time inspection to detect discrepancies of the spherical bearing of the aileron control rod, and corrective action, if necessary; and installation of an improved retainer washer in the movable joint of the aileron control rod. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent loss of the movable joint of the aileron control rod, caused by deterioration of the hinges, which could result in reduced controllability of the airplane.
AD 98-06-03 · published Mar 11, 1998, effective Apr 24, 1998
EXTRA Flugzeugbau GmbH Model EA-300 Airplanes
This amendment adopts a new airworthiness directive (AD) that applies to certain EXTRA Flugzeugbau GmbH (EXTRA) Model EA-300 airplanes. This AD requires removing the elevator mass balance assemblies and replacing them with reinforced elevator mass balance assemblies of improved design. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. The actions specified by this AD are intended to prevent damage and possible jamming of the airplane's control system, which, if not corrected, could cause loss of control of the airplane.
AD 98-06-05 · published Mar 11, 1998, effective Apr 2, 1998
Industrie Aeronautiche e Meccaniche Model Piaggio P-180 Airplanes
This amendment adopts a new airworthiness directive (AD) that applies to Industrie Aeronautiche e Meccaniche (I.A.M.) Model Piaggio P-180 airplanes that are equipped with a Rockwell Collins APS-65 autopilot system that incorporates an APC-65A autopilot computer. This AD requires incorporating airplane flight manual (AFM) and pilot's operating handbook (POH) supplements that include revised autopilot emergency disengagement procedures. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Italy. The actions specified by this AD are intended to prevent pilot difficulty in disengaging the autopilot during flight, which could result in the pilot's lack of proper attention to critical flight tasks due to the increased pilot workload with possible consequent loss of airplane controllability.
AD 98-05-03 · published Mar 12, 1998, effective Mar 17, 1998
de Havilland Model DHC-8-102 and -103 Series Airplanes
This document publishes in the Federal Register an amendment adopting airworthiness directive (AD) 98-05-03 that was sent previously by individual notices to all known U.S. owners and operators of certain de Havilland Model DHC-8-102 and -103 series airplanes. This AD requires a one-time inspection to detect disbonding of the upper and lower skin panels of the horizontal stabilizer, and repair, if necessary. This action is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent reduced strength capability and consequent failure of the horizontal stabilizer, which can result in loss of controllability of the airplane.
AD 98-06-07 · published Mar 12, 1998, effective Mar 27, 1998
Fokker Model F28 Mark 0100 Series Airplanes
This amendment supersedes an existing airworthiness directive (AD), applicable to certain Fokker Model F28 Mark 0100 series airplanes, that currently requires a revision to the Airplane Flight Manual (AFM) to include procedures to prohibit use of reverse engine thrust power settings between idle and emergency maximum. This amendment revises the existing AFM revision requirement, and adds a new revision to the AFM to prohibit stabilized engine operation in a certain engine speed range on the ground. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to prevent stabilized engine operation in a certain engine speed range on the ground, which could result in uncontained engine fan blade failure due to high cycle fatigue cracking.
AD 98-06-08 · published Mar 13, 1998, effective Apr 17, 1998
Airbus Model A300, A310, and A300-600 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A300, A310, and A300-600 series airplanes, that requires inspections to detect defects of the flanges of the bleed air ducts of the auxiliary power unit (APU), and to measure the material thickness of the flanges; and repair, replacement of the duct with a new or serviceable duct, or operation of the airplane with the bleed air system of the APU inoperative, if necessary. For certain airplanes, the amendment also requires an inspection to detect cracks of the flanges, and follow-on actions. This amendment is prompted by issuance of mandatory continued airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent rupturing and cracking of the flanges of the bleed air ducts, which could damage the elevator control system and consequently reduce the controllability of the airplane.
AD 98-06-09 · published Mar 13, 1998, effective Mar 30, 1998
British Aerospace Model HS 748 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all British Aerospace Model HS 748 series airplanes. This action requires a visual inspection to detect fatigue cracking or loose fitting stress pads of the aileron operating arm brackets; and follow- on corrective actions, if necessary. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to detect and correct fatigue cracking in the flanges of the aileron operating arm brackets, which could result in failure of the aileron operating arm brackets, failure of the aileron control system, and consequent reduced controllability of the airplane.
AD 98-06-10 · published Mar 13, 1998, effective Apr 17, 1998
Israel Aircraft Industries, Ltd., Model 1121, 1121A, 1121B, 1123, 1124, 1124A, 1125 Westwind Astra, and Astra SPX Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all Israel Aircraft Industries, Ltd., Model 1121, 1121A, 1121B, 1123, 1124, 1124A, 1125 Westwind Astra, and Astra SPX series airplanes, that requires repetitive functional tests for proper operation of hydraulic fuses installed in the brake system and emergency hydraulic indicating system; and replacement of any discrepant hydraulic fuse with a new, improved unit. This amendment is prompted by the issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent failure of the hydraulic fuse to operate properly, due to internal corrosion, in the event of an external leak downstream of the fuse, which could result in loss of hydraulic systems.
AD 98-06-11 · published Mar 13, 1998, effective Apr 17, 1998
de Havilland Model DHC-8-100 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain de Havilland Model DHC-8-100 series airplanes, that requires a one-time visual inspection to determine the presence of block seals on the upper portions of the cabin/baggage compartment bulkheads, and installation of a new or serviceable block seal for any missing block seal. This amendment is prompted by the issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent smoke contamination of the passenger and crew cabins, in the event of fire or smoke in the baggage compartment, due to a direct smoke path between the baggage compartment and the cabins.
AD 98-06-13 · published Mar 16, 1998, effective Jun 15, 1998
Dornier Luftfahrt GmbH Models 228-100, 228-101, 228-200, and 228-201 Airplanes
This amendment adopts a new airworthiness directive (AD) that applies to all Dornier Luftfahrt GmbH (Dornier) Models 228-100, 228- 101, 228-200, and 228-201 airplanes equipped with certain main landing gear (MLG). This action requires replacing the MLG axle assembly with an MLG axle assembly of improved design. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. The actions specified in this AD are intended to prevent main landing gear failure, which, if not corrected, could result in loss of control of the airplane during landing operations.
AD 98-06-14 · published Mar 16, 1998, effective Apr 20, 1998
Construcciones Aeronauticas, S.A. (CASA) Model CN-235 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all CASA Model CN-235 series airplanes, that requires installation of a contactor and relocation of the existing fuse in the battery circuit. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent failure of the battery circuit due to a burned fuse, and consequent inability to restart the engine using batteries during flight.
AD 98-06-15 · published Mar 16, 1998, effective Apr 20, 1998
Fokker Model F28 Mark 0100 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Fokker Model F28 Mark 0100 series airplanes, that requires replacement of the return filter diaphragm assemblies on hydraulic systems 1 and 2 with modified filter units having new diaphragms. This amendment is prompted by a report of insufficient running clearance of the brake units due to overpressure in the hydraulic return system; this condition could lead to brake overheating. The actions specified by this AD are intended to prevent too high pressure in the hydraulic return system during the selection of subsystem(s), which could result in inadvertent braking and/or blown tires.
AD 98-06-16 · published Mar 16, 1998, effective Apr 20, 1998
Dornier Model 328-100 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Dornier Model 328-100 series airplanes, that requires modification of the electrical circuits for certain avionics by rewiring and adding electrical devices. This amendment is prompted by reports indicating that failure of an engine or direct current (DC) generator during takeoff and landing, coupled with an open DC tie, could cause the avionics to fail. The actions specified by this AD are intended to prevent the failure of those avionics during takeoff and landing, which consequently could result in the inability of the flight crew to respond to and control the associated systems during these critical phases of flight.
AD 98-06-17 · published Mar 16, 1998, effective Apr 20, 1998
Dassault Model Mystere Falcon 900 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Dassault Aviation Model Mystere Falcon 900 series airplanes, that requires replacement of the water heater control relays with improved relays having high-power contactors; the addition of a testing and monitoring circuit for each contactor; and installation of improved electrical bonding of the potable water tank. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent overheating of the water heaters for the galley or the washbasin, which could result in damage to the water heater and nearby electrical wiring, and consequent smoke in the cabin.
AD 98-06-18 · published Mar 16, 1998, effective Apr 20, 1998
Fokker Model F28 Mark 0070 and Mark 0100 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Fokker Model F28 Mark 0070 and Mark 0100 series airplanes, that requires replacement of the operating handles of the overwing emergency exits with improved handles that have self- illumination. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to ensure that the operating handles of the overwing emergency exits are clearly visible during an emergency evacuation.
AD 98-06-19 · published Mar 16, 1998, effective Mar 31, 1998
Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-145 Series Airplanes
This amendment adopts a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-145 series airplanes. This action requires draining and sealing of the ground spoiler and speed brake actuators. This action also requires replacement of the spoiler actuator assembly and the speed brake actuator assembly with modified actuator assemblies. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to prevent asymmetric deployment of the speed brakes during flight and consequent reduced controllability of the airplane; or failure of the ground spoilers to deploy during landing or rejected takeoff, which could result in increased aircraft stopping distances.
AD 98-06-21 · published Mar 19, 1998, effective Apr 23, 1998
British Aerospace BAe Model ATP Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain British Aerospace BAe Model ATP airplanes, that requires repetitive inspections to detect uneven wear of the heat pack of the main landing gear (MLG) brake unit; measurement and setting of the wear remaining length (WRL) of the wear indicator pin (WIP); and replacement of the brake heat pack unit with a serviceable unit, if necessary. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to detect uneven wear of the brake heat pack unit and prevent failure of the pressure stator of the MLG brake unit, which could result in reduced braking efficiency and consequent longer stopping distances upon landing.
AD 98-06-22 · published Mar 19, 1998, effective Apr 23, 1998
Airbus Model A310 Series Airplanes
This amendment supersedes an existing airworthiness directive (AD), applicable to all Airbus Model A310 Series Airplanes, that currently requires measurement of the force required to move the interior control handle of the emergency exit doors, and various follow-on corrective actions, if necessary. This amendment adds repetitive functional tests to measure the force necessary to move the interior control handle of the emergency exit doors; and requires adjusting an emergency exit door or replacing the bearing of the door lifting mechanism, if necessary. This amendment is prompted by reports of seizure of a bearing and increased door handle forces that were outside the limits of the required hand forces due to seizure of two teflon line bearings on the lifting shaft. The actions specified by this AD are intended to prevent impeding passenger evacuation during an emergency due to difficulty in lifting the interior control handle that is used to open the emergency exit door.
AD 98-06-23 · published Mar 19, 1998, effective Apr 23, 1998
Saab Model SAAB 2000 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Saab Model SAAB 2000 series airplanes, that requires application of sealant to the auxiliary power unit (APU) firezone bulkhead. This amendment is prompted by issuance of mandatory continued airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent hazardous amounts of flame, fuel, and vapor from entering compartments outside the fire zone due to unsealed openings in the firezone bulkhead, which could result in a fire outside the APU firezone compartment.
AD 98-06-20 · published Mar 20, 1998, effective Apr 24, 1998
Airbus Model A320 Series Airplanes
This amendment supersedes an existing airworthiness directive (AD), applicable to certain Airbus Model A320 series airplanes, that currently requires inspections to detect cracking of certain floor beams and side box-beams, and repair of cracks; and modification of the pressure floor. That AD was prompted by results of a full-scale fatigue test. This amendment adds a one-time inspection to verify proper clearance between the fasteners of the reinforcement bracket and the bellcrank of the free-fall extension system of the main landing gear (MLG) and its associated tie rod attachment nut. This amendment also adds a requirement for a new improved modification of the pressure floor. The actions specified by this AD are intended to prevent reduced structural integrity of the fuselage, restricted operation of the MLG free-fall system and, consequently, reduced ability to use the MLG during an emergency.
AD 98-06-24 · published Mar 20, 1998, effective Apr 6, 1998
Airbus Model A330 and A340 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A330 and A340 series airplanes. This action requires modification to reinforce the joints of certain fuselage frames. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to prevent fatigue cracking of the fuselage frames, which could result in reduced structural integrity of the airplane.
AD 98-06-25 · published Mar 20, 1998, effective Apr 27, 1998
Fairchild Aircraft Inc. Models SA226- AT, SA226-TC, SA227-AC, and SA227-AT Airplanes
This amendment adopts a new airworthiness directive (AD) that applies to Fairchild Aircraft Inc. (Fairchild) Models SA226-AT, SA226- TC, SA227-AC, and SA227-AT airplanes. This action would require inspecting the cargo door lower belt frames at the cargo latch receptacles for cracks in the belt frames, repairing any cracks, and reinforcing the cargo door lower belt frames by installing doublers. The AD is the result of a decompression incident during flight caused by fatigue at the bottom of the cargo door on a Fairchild Model SA226- TC. The actions specified by this AD are intended to prevent the failure of the cargo door in flight, which could cause decompression injuries to passengers and substantial structural damage to the airplane.
AD 98-06-26 · published Mar 20, 1998, effective Apr 24, 1998
Fokker Model F28 Mark 0100 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Fokker Model F28 Mark 0100 series airplanes, that requires repetitive inspections to detect corrosion in the wheel axles of the main landing gear (MLG) sliding members; and rework of any corroded areas, an inspection to detect cracks in the wheel axles, and replacement of any cracked sliding member. This AD provides for interim actions that may be accomplished in lieu of the repetitive inspections. This AD also requires eventual modifications of the main wheel brake units and the MLG sliding members; when accomplished, these modifications terminate the repetitive inspections and interim actions. This amendment is prompted by a report of failure of an MLG wheel axle during push back of an in-service airplane from the terminal. The actions specified by this AD are intended to prevent failure of the MLG wheel axle due to problems associated with corrosion and cracking.
AD 98-06-27 · published Mar 20, 1998, effective Apr 24, 1998
Fokker Model F28 Mark 0100 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Fokker Model F28 Mark 0100 series airplanes, that requires installation of additional ``EXIT'' signs at the overwing emergency exits. This amendment is prompted by a report indicating that the ``EXIT'' signs for the overwing emergency exits, as currently installed, would not be visible to passengers during an emergency evacuation when the emergency exit doors are open. The actions specified by this AD are intended to ensure the ``EXIT'' signs for overwing emergency exits are clearly visible during an evacuation.
AD 98-06-28 · published Mar 20, 1998, effective Apr 24, 1998
Learjet Model 31 and 35A Airplanes
This amendment supersedes an existing airworthiness directive (AD), applicable to certain Learjet Model 31 and 35A airplanes, that currently requires replacement of two segments of 16 American Wire Gauge (AWG) wire with 8 AWG wire at the connector that is connected to the auxiliary cabin heater relay box. That AD was prompted by a report indicating that two segments of the 16 AWG wire in the auxiliary cabin heater, which were spliced during production, do not provide adequate current-carrying capacity. This amendment requires the installation of a new replacement wire assembly. The actions specified by this AD are intended to prevent electrical arcing and consequent fire hazard that could result from wiring with inadequate current-carrying capacity.
AD 98-06-29 · published Mar 20, 1998, effective Apr 24, 1998
Boeing Model 747-400 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747-400 series airplanes, that requires a one-time inspection of the separation between the galley power feeder and static ground wiring, and the adjacent passenger oxygen system tubing in the forward ceiling area above the door 4 galley; and rerouting of wiring, and installing clamps and sleeves, if necessary. This amendment is prompted by reports of inadequate clearance between the galley power feeder wiring and passenger oxygen system tubing. The actions specified by this AD are intended to prevent such inadequate clearance, which could result in a fire in the ceiling area above the door 4 galley due to chafing of wiring on oxygen system tubing.
AD 98-06-30 · published Mar 20, 1998, effective Apr 24, 1998
Raytheon (Beech) Model 400, 400A, 400T, MU-300, and MU-300-10 Airplanes
This amendment supersedes an existing airworthiness directive (AD), applicable to certain Raytheon (Beech) Model 400, 400A, 400T, MU- 300, MU-300-10 airplanes, that currently requires replacement of outflow/safety valves with serviceable valves. This amendment revises the applicability of the existing AD to add an airplane model and to remove other airplanes, as well as to identify the serial numbers of affected airplanes. The actions specified by this AD are intended to prevent cracking and consequent failure of the outflow/safety valves, which could result in rapid decompression of the airplane.
AD 98-06-31 · published Mar 20, 1998, effective Apr 24, 1998
Airbus Model A300, A310, and A300-600 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A300, A310, and A300-600 series airplanes, that requires inspections to detect cracking of the aft door frame area, and repair, if necessary. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to detect and correct cracks in the aft door frame area, which could result in reduced structural integrity and rapid decompression of the airplane.
AD 98-06-33 · published Mar 23, 1998, effective Apr 27, 1998
Fokker Model F28 Mark 1000 Through 4000 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Fokker Model F28 Mark 1000 through 4000 series airplanes, that requires replacing certain flexible hydraulic hoses that connect to the UP-port of the actuator of each main landing gear (MLG) with certain new flexible hoses that have built-in restrictor check-valves. This amendment is prompted by results of tests, which indicate that, for airplanes on which restrictor check-valves are not installed, sudden movement of the actuator of the MLG, which could occur under extreme inward sideload conditions (such as touching down at a large crab angle), may pressurize the downlock-actuator and lift the MLG toggle-links. The actions specified by this AD are intended to prevent such pressurization of the downlock-actuator and consequent lifting of the toggle-links, which could result in collapse of the MLG and reduced controllability of the airplane during landing.
AD 98-07-01 · published Mar 23, 1998, effective Apr 27, 1998
British Aerospace BAe Model ATP Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain British Aerospace BAe Model ATP airplanes, that requires inspections and tests for damage of the engine power cables, and replacement of any damaged cable with a new cable. This amendment also provides for optional modification of the engine power control cable pulley assembly. This amendment is prompted by a report of failure of an engine power cable, which could cause loss of function of the power control levers on the console. The actions specified by this AD are intended to prevent loss of function of the power control levers on the console, and subsequent loss of normal control of engine power.
AD 98-07-05 · published Mar 30, 1998, effective May 4, 1998
Saab Model SAAB 2000 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Saab Model SAAB 2000 series airplanes, that requires replacement of the main landing gear (MLG) trunnion fittings with reinforced trunnion fittings. This amendment is prompted by the issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent collapse of the MLG due to fatigue cracking of the MLG trunnion fittings.
AD 98-07-06 · published Mar 30, 1998, effective May 4, 1998
British Aerospace Model BAe 146-100A, - 200A, and -300A, and Model Avro 146-RJ Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain British Aerospace Model BAe 146-100A, -200A, and -300A, and Model Avro 146-RJ series airplanes, that requires repetitive inspections of the attachment brackets between the horizontal and vertical stabilizers to detect intergranular corrosion, and follow-on actions. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to detect and correct reduced structural integrity of the stabilizer brackets due to corrosion, which could result in reduced controllability of the airplane.
AD 98-06-34 · published Mar 31, 1998, effective May 5, 1998
Aerospatiale Model ATR-42 and ATR-72 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all Aerospatiale Model ATR-42 and ATR-72 series airplanes, that requires revising the Airplane Flight Manual (AFM) to modify the limitation that prohibits positioning the power levers below the flight idle stop during flight, and to provide a statement of the consequences of positioning the power levers below the flight idle stop during flight. This amendment is prompted by incidents and accidents involving airplanes equipped with turboprop engines in which the ground propeller beta range was used improperly during flight. The actions specified by this AD are intended to prevent loss of airplane controllability, or engine overspeed and consequent loss of engine power caused by the power levers being positioned below the flight idle stop while the airplane is in flight.
AD 98-05-10 · published Mar 3, 1998, effective Mar 18, 1998
Robinson Helicopter Company Model R44 Helicopters
This amendment adopts a new airworthiness directive (AD) that is applicable to Robinson Helicopter Company (Robinson) Model R44 helicopters. This action requires replacing the aluminum elbows that connect the oil cooler lines to the engine accessory case with steel elbows. This amendment is prompted by two reports of cracks that were discovered in aluminum elbows. The actions specified in this AD are intended to prevent failure of either the 45 deg. or 90 deg. aluminum elbows that connect the oil lines from the oil cooler to the engine accessory case, which would cause loss of engine oil, resulting in an engine failure and a subsequent forced landing.
AD 98-05-17 · published Mar 6, 1998, effective Mar 23, 1998
Eurocopter France Model SA-365N, SA- 365N1, AS-365N2, and SA-366G1 Helicopters
This amendment adopts a new airworthiness directive (AD) that is applicable to Eurocopter France Model SA-365N, SA-365N1, AS-365N2, and SA-366G1 helicopters. This action requires inspecting for rotational play or looseness of the outboard fin attachment studs (studs) and washers (if washers are present); inspecting each stud for incremental rotational movement or pure rotation; and if there is rotational play or looseness of any individual stud, performing a dye- penetrant inspection for cracks on each stud utilized in the installation. This amendment is prompted by a report of an outboard fin separating from the helicopter during flight, and several reports of loose outboard fins in service. This condition, if not corrected, could result in an outboard fin separating and contacting the rotor blades during flight, and subsequent loss of control of the helicopter.
AD 98-06-12 · published Mar 13, 1998, effective Mar 30, 1998
Eurocopter France Model AS-350B, BA, B1, B2, and D Helicopters, and Model AS 355E, F, F1, F2, and N Helicopters
This amendment adopts a new airworthiness directive (AD) that is applicable to Eurocopter France Model AS-350B, BA, B1, B2, and D helicopters, and Model AS 355E, F, F1, F2, and N helicopters. This action requires replacing certain tailboom attachment bolts located above the cargo compartment floor. This amendment is prompted by two reports of attachment bolts' strength properties not meeting design specifications during manufacture. The actions specified in this AD are intended to identify and remove the weaker bolts and to prevent the separation of the tailboom from the helicopter, and subsequent loss of control of the helicopter.
AD 98-06-06 · published Mar 16, 1998, effective Mar 31, 1998
GKN Westland Helicopters Ltd., 30 Series Helicopters
This amendment adopts a new airworthiness directive (AD) that is applicable to GKN Westland Helicopters Ltd. (Westland) 30 series helicopters. This action requires determining the total hours time-in- service (TIS) of the six tail rotor drive shafts (drive shafts), creating a component history card or an equivalent record for each shaft, and replacing those drive shafts that exceed a certain TIS with an airworthy drive shaft. This amendment is prompted by findings of drive shaft attachment flange cracks on similar British military model helicopters. This condition, if not corrected, could result in failure of the drive shaft coupling attachment flanges that could result in loss of power to the tail rotor and subsequent loss of control of the helicopter.
AD 98-06-32 · published Mar 18, 1998, effective Apr 2, 1998
Eurocopter France Model AS 332C, L, and L1 Helicopters
This amendment adopts a new airworthiness directive (AD) that is applicable to Eurocopter France Model AS 332C, L, and L1 helicopters. This action requires greasing and inspecting main rotor blade horn eye bolts (eye bolts), and replacing certain eye bolt bearings (bearings) with airworthy bearings. This amendment is prompted by one report of abnormally high amplitude inflight vibrations due to failure of a bearing. The actions specified in this AD are intended to prevent failure of a bearing, due to premature wear caused by an improper axial pre-load, which could result in loss of main rotor blade pitch control and subsequent loss of control of the helicopter.
AD 98-06-35 · published Mar 20, 1998, effective Apr 6, 1998
Eurocopter France Model SA-366G1 Helicopters
This amendment adopts a new airworthiness directive (AD) that is applicable to Eurocopter France Model SA-366G1 helicopters. This action requires initial and repetitive inspections of the tail rotor blade Kevlar tie-bar (Kevlar tie-bar) for delaminations. This amendment is prompted by a report of delamination of a Kevlar tie-bar. The actions specified in this AD are intended to detect delaminations of the Kevlar tie-bar, that could result in loss of anti-torque function and subsequent loss of control of the helicopter.
AD 98-06-36 · published Mar 20, 1998, effective Apr 6, 1998
Eurocopter France Model SA341G and SA342J Helicopters
This amendment adopts a new airworthiness directive (AD) that is applicable to Eurocopter France Model SA341G and SA342J helicopters. This action requires inspecting the tail gearbox support tripod (support tripod) for cracks. This amendment is prompted by reports of cracks that were discovered during routine maintenance inspections. The actions specified in this AD are intended to detect cracks at the welds of the tail gearbox support tripod, which could cause failure of one or more of the tripod arms, subsequent separation of the tail gearbox, and loss of control of the helicopter.
AD 98-06-39 · published Mar 20, 1998, effective Apr 6, 1998
Eurocopter France Model AS 332C, L, L1, and L2 Helicopters
This amendment adopts a new airworthiness directive (AD) that is applicable to Eurocopter France Model AS 332C, L, L1, and L2 helicopters. This action requires determining the thickness of the shim washers, inspecting certain cockpit door hinge tenons (hinge tenons) for cracks, and if a crack is found, replacing the hinge tenon with an airworthy hinge tenon. This amendment is prompted by several reports of cracked hinge tenons due to improper shimming. The actions specified in this AD are intended to detect cracks in the hinge tenons due to unintended loading of the improperly shimmed tenons caused by closing the door, which may lead to separation of the door from the helicopter, impact with the main rotor or tail rotor system, and subsequent loss of control of the helicopter.
AD 98-07-03 · published Mar 24, 1998, effective Apr 8, 1998
Bell Helicopter Textron, Inc. Model 412 Helicopters and Agusta S.p.A. Model AB412 Helicopters
This amendment adopts a new airworthiness directive (AD) that is applicable to Bell Helicopter Textron, Inc. (Bell) Model 412 helicopters and Agusta S.p.A. (Agusta) Model AB412 helicopters. This action requires a temporary reduction of the never-exceed velocity (Vne) limitation until an inspection of the tail rotor yoke (yoke) assembly for fatigue damage and installation of a redesigned yoke flapping stop are accomplished. Recurring periodic and special inspections to detect occurrences of yoke overload are also required. This amendment is prompted by laboratory tests and engineering analyses that indicated that the yoke assembly is susceptible to fatigue damage due to unforeseen static and dynamic loading of the tail rotor against the original flapping stop. The actions specified in this AD are intended to prevent fatigue failure of the yoke that could result in loss of control of the tail rotor and subsequent loss of control of the helicopter.
AD 98-07-02 · published Mar 30, 1998, effective Mar 30, 1998
CFM International CFM56-2, -3, -3B, and -3C Series Turbofan Engines
This amendment adopts a new airworthiness directive (AD) that is applicable to CFM International CFM56-2, -3, -3B, and -3C series turbofan engines. This action requires the removal from service of certain No. 3 bearing rear stationary air/oil seals, replacement with serviceable parts, and the installation of retention bushings. This action also requires the removal from service of high pressure compressor rotor (HPCR) stage 1-2 spools that have contacted the outer cone of the seal. This amendment is prompted by several reports of outer cone separation of the No. 3 bearing rear stationary air/oil seal. The actions specified in this AD are intended to prevent rubs between the outer cone of the No. 3 bearing rear stationary air/oil seal and the HPCR stage 1-2 spool, which could result in a potential uncontained failure of the HPCR stage 1-2 spool, and damage to the aircraft.
AD 98-05-05 · published Mar 3, 1998, effective Apr 17, 1998
Aeromot-Industria Mecanico Metalurgica Ltda. Models AMT-100 and AMT-200 Powered Gliders
This amendment adopts a new airworthiness directive (AD) that applies to certain Aeromot-Industria Mecanico Metalurgica Ltda. (Aeromot) Models AMT-100 and AMT-200 powered gliders. This AD requires replacing all main landing gear attaching nuts and bolts with ones of improved design. This AD is the result of mandatory continued airworthiness information (MCAI) issued by the airworthiness authority for Brazil. The actions specified by this AD are intended to prevent failure of the main landing gear, which could result in loss of control of the glider during landing operations.
AD 98-06-37 · published Mar 20, 1998, effective Apr 28, 1998
Alexander Schleicher Segelflugzeugbau Model ASK-21 Sailplanes
This amendment adopts a new airworthiness directive (AD) that applies to certain Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK-21 sailplanes. This AD requires replacing any tow release cable assembly that does not have a swivel-type end with a cable assembly that does have a swivel-type end. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. The actions specified by this AD are intended to prevent the inability to release the tow rope because of the design of the cable assembly, which could result in loss of control of the sailplane during towing operations.
AD 98-06-38 · published Mar 20, 1998, effective Apr 28, 1998
Alexander Schleicher Segelflugzeugbau Model ASK-21 Sailplanes
This amendment adopts a new airworthiness directive (AD) that applies to Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK-21 sailplanes that do not have a certain automatic elevator connection installed. This AD requires drilling a drainage hole in the elevator pushrod, inspecting the elevator pushrod for corrosion damage, and replacing any elevator pushrod if a certain amount of corrosion damage is found. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. The actions specified by this AD are intended to prevent failure of the elevator pushrod caused by corrosion damage, which could result in loss of control of the sailplane.
