27 Airworthiness Directives: 21 airplane, 4 engine, 1 propeller, 1 appliance.
AD 98-01-09 · published Jan 7, 1998, effective Jan 22, 1998
Airbus Model A300-600 and A310 Series Airplanes
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Airbus Model A300-600 and A310 series airplanes. This action requires revising the Airplane Flight Manual (AFM) to instruct the flightcrew to crosscheck certain primary power setting parameters of the Thrust Control Computer (TCC) against tables of these values; and apply corrective action, if necessary. This amendment also provides for optional terminating action for the AFM revision. 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 ensure that the flightcrew is provided with procedures for crosschecking and correcting certain primary power setting parameters of the TCC; incorrect parameters could result in insufficient thrust being applied during takeoff.
AD 98-01-10 · published Jan 9, 1998, effective Feb 9, 1998
Empresa Brasileira de Aeronautica S.A., Models EMB-110P1 and EMB-110P2 Airplanes
This amendment supersedes Airworthiness Directive (AD) 87-03- 10, which currently requires repetitively inspecting the fillet area of both the left and right main landing gear (MLG) wheel axle/piston tube support junction area for cracks on Empresa Brasileira de Aeronautica S.A. (EMBRAER) Models EMB-110P1 and EMB-110P2 airplanes, and requires replacing any MLG wheel axle/piston tube assembly where a crack is found. AD 87-03-10 also provided the option of reworking this area when no cracks were found as terminating action for the repetitive inspections. The Federal Aviation Administration's policy on aging commuter-class aircraft is to eliminate or, in certain instances, reduce the number of certain repetitive short-interval inspections when improved parts or modifications are available. This AD requires the following on EMBRAER Models EMB 110-P1 and EMB 110-P2 airplanes that do not have an ``R'' stamped on both the left and right MLG wheel axle/ piston tube assembly end-piece: inspecting (one-time) the fillet area of each MLG wheel axle/piston tube support junction area to assure that the area is free of cracks, replacing any MLG wheel axle/piston tube assembly if a crack is found, and reworking this area on both the left and right MLG's, as terminating action for the repetitive inspections that are currently required by AD 87-03-10. The actions specified in this AD are intended to prevent failure of the MLG wheel axle/piston tube assembly caused by fatigue cracking, which could result in loss of control of the airplane during landing operations.
AD 97-11-02 R1 · published Jan 12, 1998, effective Feb 17, 1998
British Aerospace (Jetstream) Model 4101 Airplanes
This amendment revises an existing airworthiness directive (AD), applicable to certain British Aerospace (Jetstream) Model 4101 airplanes, that currently requires an inspection to determine the thickness of the intercostal that attaches the third crew member seat to the floor structure in the flight compartment, and replacement, if necessary. That action was prompted by a report from the manufacturer indicating that intercostals have been installed that are not of sufficient thickness (and consequent strength) to support the third crew member seat during emergency landing dynamic conditions. The actions specified by that AD are intended to prevent the failure of this intercostal during an emergency landing, which could consequently result in injury to the flight crew. This amendment revises the applicability of the existing AD by removing several airplanes.
AD 98-01-11 · published Jan 12, 1998, effective Feb 17, 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 certain electrical terminals with new electrical terminals. 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 loose electrical connections from causing an increase in electrical resistance, which could result in overheating at the electrical terminals and consequent smoke/fire in the airplane passenger cabin.
AD 98-01-20 · published Jan 12, 1998, effective Jan 27, 1998
Airbus Model A310 and A300-600 Series Airplanes
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Airbus Model A310 and A300-600 series airplanes. This action requires a one-time inspection of the attachment bolts and washers for the forward cargo container and pallet latches in the aft cargo compartment to determine if bolts and washers having the correct part numbers are installed; and replacement of the bolts and washers with parts having the correct part numbers, if necessary. This AD also requires revising the Airplane Flight Manual and certain supplements to specify certain cargo loading procedures that must be used until the inspection is accomplished. 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 cargo from shifting in flight, and consequent structural damage and reduced controllability of the airplane.
AD 98-01-12 · published Jan 13, 1998, effective Feb 17, 1998
Airbus Industrie Model A320 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Industrie Model A320 series airplanes, that requires an inspection to detect moisture and migrated bushings of the guide fittings of the safety locking pins of the passenger doors, removal of any moisture, application of grease, and reinstallation of any migrated bushing. This amendment also requires installation of a greasing nipple on the guide fitting of the locking pin and on three telescopic rods on the passenger doors. This amendment is prompted by reports of difficulty opening the passenger doors due to jamming of the locking pin. The actions specified by this AD are intended to prevent such jamming of the locking pin, which could result in inability to open the passenger door. This condition, if not corrected, could impede or delay passengers from exiting the airplane during an emergency.
AD 98-01-15 · published Jan 13, 1998, effective Jan 28, 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 repetitive operational tests of the override mechanism of the trimmable horizontal stabilizer (THS) to determine if the system functions correctly; and corrective action, if necessary. 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 prevent uncommanded movement of the THS, which could result in reduced controllability of the airplane.
AD 98-01-16 · published Jan 13, 1998, effective Jan 28, 1998
Fokker Model F27 Mark 050 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Fokker Model F27 Mark 050 series airplanes. This action requires replacement of the spring tab balance units in the ailerons and the inboard aileron hinge bolts and bearings with improved parts. 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 failure of the aileron gustlock mechanism and the inboard aileron hinge bolt, which could result in inability to operate the ailerons, and consequent reduced controllability of the airplane.
AD 98-01-17 · published Jan 13, 1998, effective Feb 17, 1998
Airbus Model A320 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A320 series airplanes, that requires replacement of a capacitor of the main landing gear (MLG) circuitry with a new electrolytic capacitor having a tantalum casing. 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 the failure of the landing gear to retract properly as a result of failure of a capacitor in the MLG circuitry and subsequent power interruption.
AD 98-01-18 · published Jan 13, 1998, effective Feb 17, 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 a certain electrical panel and relay support. 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 possible electrical short circuits, which could result in loss of certain electrical indicating and recording systems, and the possibility of a fire.
AD 98-01-19 · published Jan 13, 1998, effective Feb 17, 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 the main landing gear (MLG) uplocks with new or modified MLG uplocks. 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 MLG to lock in the stowed position due to ice accumulation on the uplock hook and roller assembly, which could result in the inadvertent deployment of the MLG during flight.
AD 98-02-01 · published Jan 13, 1998, effective Feb 17, 1998
Boeing Model 737-100, -200, -300, -400, and -500 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all Boeing Model 737-100, -200, -300, -400, and -500 series airplanes, that requires removing the yaw damper coupler; replacing its internal rate gyroscope with a new or overhauled unit; and performing a test to verify the integrity of the yaw damper coupler, and repair, if necessary. This amendment is prompted by an FAA determination that requiring replacement of the internal rate gyroscope will significantly increase the reliability of the yaw damper coupler system. The actions specified by this AD are intended to prevent sudden uncommanded yawing of the airplane due to potential failures within the yaw damper system, and consequent injury to passengers and crewmembers.
AD 98-02-02 · published Jan 16, 1998, effective Feb 2, 1998
Boeing Model 747 Series Airplanes Equipped with Pratt & Whitney JT9D-3 and -7 Series Engines
This amendment supersedes an existing airworthiness directive (AD), applicable to certain Boeing Model 747 series airplanes, that currently requires repetitive inspections for discrepancies of the forward engine mount bulkhead of the nacelle strut, and corrective action, if necessary. That AD also provides for optional terminating action for the repetitive inspections. For certain airplanes, this amendment adds repetitive inspections for discrepancies in the forward engine mount bulkhead and in the forward lower spar web, and corrective actions, if necessary. For other airplanes, this amendment adds a one- time inspection to detect stop drilled cracks of the exterior of the forward engine mount chord, and replacement of the chord with a new chord, if necessary. This amendment also adds an additional optional terminating action for the repetitive inspections. This amendment is prompted by reports that fatigue cracking was found in an area adjacent to the inspection area specified in the existing AD. The actions specified in this AD are intended to detect and correct such fatigue cracking, which could lead to the failure of the forward engine mount bulkhead and consequent separation of the engine from the airplane.
AD 98-02-03 · published Jan 16, 1998, effective Feb 20, 1998
Fokker Model F28 Mark 0100 and Mark 0070 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Fokker Model F28 Mark 0100 and Mark 0070 series airplanes, that requires modification of the hook and latch engagement assemblies of the engine cowl doors, measurement of the aerodynamic mismatch between the fixed cowl and lower cowl door, and repair, if necessary. This amendment is prompted by reports of operational experience that indicate that an aerodynamic mismatch may exist between the fixed engine cowl and the lower cowl door, and may be the result of one or more hooks of the engagement assemblies not engaging adequately. This condition may cause the other hooks to carry loads higher than they were originally designed to carry, and could result in the failure of those hooks that are engaged. The actions specified by this AD are intended to prevent possible separation of the lower cowling from the airplane due to failure of the hooks of the engagement assemblies.
AD 98-01-01 · published Jan 23, 1998, effective Feb 2, 1998
Cessna Aircraft Company Models 172R and 182S Airplanes
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 98-01-01, which was sent previously to all known U.S. owners and operators of certain Cessna Aircraft Company (Cessna) Models 172R and 182S airplanes. This AD requires fabricating and installing placards to prohibit operation in instrument flight rules (IFR) conditions and use of the alternate static air source; inspecting the alternate static air source valve to assure that the alternate static air source port is not restricted by the identification placard and to assure that the valve body does not separate from the valve flange; and reworking or replacing as necessary. The AD was the result of reports of improper installation of the identification placard on the alternate static air source. The actions specified by this AD are intended to prevent erroneous indications from the altimeter, airspeed, and vertical speed indicators, which could cause the pilot to react to incorrect flight information and possibly result in loss of control of the airplane.
AD 98-02-06 · published Jan 23, 1998, effective Feb 9, 1998
Boeing Model 777-200 Series Airplanes
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Boeing Model 777-200 series airplanes. This action requires repetitive visual inspections to determine the presence and condition of the nut and cotter pin of the lock link mechanism on the side struts and drag struts on the main landing gear (MLG); and corrective action, if necessary. This amendment is prompted by reports of missing or damaged components on the lock link mechanism. The actions specified in this AD are intended to prevent failure of the lock link mechanism to lock the MLG in the down position, and consequent collapse of the MLG during ground operation.
AD 98-03-01 · published Jan 28, 1998, effective Mar 4, 1998
Dassault Model Mystere Falcon 200 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all Dassault Model Mystere Falcon 200 series airplanes, that requires reducing the life limit of the polyurethane foam used in the fuselage fuel tanks. 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 replacement of the polyurethane foam in the fuselage fuel tanks when it has reached its maximum life limit; polyurethane foam that is not replaced in a timely manner could result in fuel contamination or increased risk of explosion in the fuselage fuel tank.
AD 98-03-03 · published Jan 29, 1998, effective Feb 13, 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 a one-time inspection of the free-fall actuators of the landing gear for discrepancies, and replacement of discrepant actuators with new, improved actuators. This action also requires eventual replacement of certain free-fall actuators. 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 electrical short circuits to the free-fall actuators of the landing gear, which could result in failure to extend the landing gear, and consequent damage to the airplane structure during landing.
AD 98-03-02 · published Jan 30, 1998, effective Mar 6, 1998
Bombardier Model CL-600-1A11 and CL- 600-2A12 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Bombardier Model CL-600-1A11 and CL-600-2A12 series airplanes, that requires replacement of the anti-noise filter on the standby and auxiliary power unit (APU) fuel pump assemblies with a new filter. 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 electrical arcing between the internal wiring and casing of the anti- noise filter on the standby and APU fuel pump assemblies, and consequent increased risk of fuel tank explosion or fire.
AD 98-03-04 · published Jan 30, 1998, effective Feb 17, 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 revising the Airplane Flight Manual (AFM) to prohibit use of the autobrake during landing on contaminated runways. This action also requires replacement of the brake and steering control unit (BSCU) with a new BSCU, which eliminates the need for the AFM revision. For certain airplanes, this action also requires installation of new brakes. 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 prevent insufficient braking capability, which could increase the potential for landing overrun.
AD 98-03-05 · published Jan 30, 1998, effective Feb 17, 1998
Airbus Model A330 and A340 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all Airbus Model A330 and A340 series airplanes. This action requires removal of three electric motor-driven hydraulic pumps (EHP) and associated wiring, and installation of placards in the flight deck. 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 operation of the EHP, which could result in fire in the wheel well area, and consequent damage to airplane structure or injury to airplane occupants.
AD 97-25-07 · published Jan 13, 1998, effective Jan 28, 1998
GE Aircraft Engines CT7 Series Turboprop Engines
This amendment supersedes an existing airworthiness directive (AD), applicable to GE Aircraft Engines (GE) CT7 series turboprop engines, that currently requires eddy current inspection (ECI) of disk holes of stage 1 and 2 gas generator turbine (GGT) disks for cracks, and, if necessary, replacement with serviceable parts. This amendment increases the initial cyclic compliance threshold while decreasing the calendar time for performing the ECI. This amendment is prompted by corrections to the applicable alert service bulletin (ASB) serial number (S/N) tables. The ASB contained S/Ns which appeared in more than one table creating confusion over which cyclic limit applied to each S/ N. The actions specified by this AD are intended to prevent a stage 1 or 2 GGT disk failure, which could result in an uncontained engine failure and damage to the aircraft.
AD 98-02-04 · published Jan 21, 1998, effective Mar 23, 1998
CFM International CFM56-5B/2P Series Turbofan Engines
This amendment adopts a new airworthiness directive (AD), applicable to CFM International (CFMI) CFM56-5B/2P series turbofan engines, that requires a reduction of the low cycle fatigue (LCF) retirement life for certain low pressure turbine (LPT) cases. This amendment is prompted by the results of a refined life analysis performed by the manufacturer which revealed minimum calculated LCF lives significantly lower than the published LCF retirement life. The actions specified by this AD are intended to prevent a LCF failure of the LPT case, which could result in damage to the aircraft.
AD 89-23-06 R1 · published Jan 28, 1998, effective Jan 28, 1998
CFM International CFM56-2, -3, -3B, - 3C, and -5 Series Turbofan Engines
This amendment revises an existing airworthiness directive (AD), applicable to CFM International (CFMI) CFM56-2, -3, -3B, -3C, and -5 series turbofan engines, that currently requires repetitive magnetic chip detector (MCD) inspections and removal from service of certain No. 3 bearings. This amendment removes the requirement for MCD inspections for certain No. 3 bearings if the bearing has 6,000 or more hours time in service since new, extends the removal from service date for certain No. 3 bearings, changes the inspection interval for certain No. 3 bearings, deletes a specific No. 3 bearing part number, and replaces reference to specific maintenance manuals with service bulletins. Other requirements of the current AD remain unchanged and are carried over into this revised AD. This amendment is prompted by additional data that demonstrates a reduced bearing failure rate after a period of time in service; therefore, an acceptable level of safety can be maintained with a relaxation of some of the current AD requirements. The actions specified by this AD are intended to prevent a No. 3 bearing failure, and a subsequent inflight engine shutdown.
AD 98-02-08 · published Jan 28, 1998, effective Mar 30, 1998
Certain Textron Lycoming 320 and 360 Series Reciprocating Engines
This amendment adopts a new airworthiness directive (AD), applicable to certain Textron Lycoming 320 and 360 series reciprocating engines, that requires visual inspections of the inside diameter (ID) of the crankshaft for corrosion pits, and if corrosion pits are found during this inspection, prior to further flight, performing a magnetic particle inspection (MPI) or fluorescent penetrant inspection (FPI) of the ID for cracks. In addition, this AD requires reporting findings of inspections to the FAA. Finally, terminating action to the inspections of this AD is the application of a preventive treatment coating on non- corroded crankshafts to prevent corrosion. This amendment is prompted by reports of cracks in crankshafts originating from corrosion pits in the ID. The actions specified by this AD are intended to prevent crankshaft failure, which can result in engine failure, propeller separation, forced landing, and possible damage to the aircraft.
AD 98-02-07 · published Jan 28, 1998, effective Feb 12, 1998
Hartzell Propeller Inc. Model HC-E4A- 3(A,I) Propellers
This amendment adopts a new airworthiness directive (AD) that is applicable to Hartzell Propeller Inc. Model HC-E4A-3(A,I) propellers. This action requires replacing propeller blade counterweight clamp bolts with improved bolts. This amendment is prompted by reports of a manufacturing defect in the counterweight clamp bolts that resulted in the blade counterweight separating and causing damage to the propeller. The actions specified in this AD are intended to prevent counterweight clamp bolt failure, which can result in propeller blade counterweight separation and damage to the propeller and aircraft.
AD 98-01-06 · published Jan 9, 1998, effective Feb 13, 1998
Precision Airmotive Corporation Carburetors
This amendment supersedes an existing airworthiness directive (AD), applicable to Precision Airmotive Corporation carburetors, that currently requires the inspection of those carburetors equipped with a two-piece venturi at each annual inspection to determine if the primary venturi is loose or missing, and requires the replacement of a two- piece venturi with a one-piece venturi within 48 months after the effective date of the existing AD. This amendment eliminates the requirement to install a one-piece venturi, and allows the installation of a one-piece venturi on affected carburetors as an optional terminating action; or, requires repetitive inspections of a two-piece venturi on affected carburetors. This AD also adds an additional carburetor model, and requires the installation of a new fuel nozzle on certain carburetors when a one-piece venturi is installed. This amendment is prompted by service difficulty reports describing engines that fail to attain rated power, run rough, or experience power loss after installation of a one-piece venturi in accordance with the existing AD, and by incidents of forced landings of aircraft powered by engines modified to comply with the existing AD. The actions specified by this AD are intended to prevent disruption of fuel flow to the engine resulting in failure to attain rated power, power loss in flight, and forced landings.
