24 Airworthiness Directives: 17 airplane, 6 engine, 1 appliance.
AD 95-06-51 · published Apr 6, 1995, effective Apr 21, 1995
Lockheed Model L-1011-385 Series Airplanes
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) T95-06-51 that was sent previously to all known U.S. owners and operators of Lockheed Model L- 1011-385 series airplanes by individual telegrams. This AD requires inspection to detect corrosion, severed braided strands, or fuel leakage of the fuel feed line hose assembly on engine number two; and subsequent inspection or replacement of the fuel hose with a serviceable part, if necessary. This AD also requires treatment of the ends of the fuel hose and modification of the heat-shrunk plastic cover and steel identification band area. This amendment is prompted by a report of failure of an aluminum-braided flexible fuel hose on a Model L-1011-385 series airplane due to corrosion. The actions specified by this AD are intended to prevent failure of a flexible fuel hose, which could result in failure of an engine, loss of fuel, and a resultant fire.
AD 95-04-03 · published Apr 7, 1995, effective Apr 7, 1995
Textron Aviation Inc. Airplanes
This amendment supersedes Airworthiness Directive (AD) 92-08-07, which currently requires inspecting (one-time) the wing front spar carry-through frame structure for cracks on certain Beech 33, 35, and 36 series airplanes, and repairing or reinforcing any cracked wing front spar carry-through frame structure. This action would make this one-time inspection repetitive. This action was prompted by numerous (43) reports received by the Federal Aviation Administration (FAA) of cracks found on the wing front spar carry-through frame structure of the affected airplanes. These cracks were found during the inspection required by AD 92-08-07. The actions specified by the proposed AD are intended to prevent spar carry-through frame structure failure caused by cracking, which, if not detected and corrected, could result in severe structural damage to the wing. The incorporation by reference of certain publications listed in the regulations was previously approved by the Directorof the Federal Register as of March 18, 1992.
AD 95-08-02 · published Apr 10, 1995, effective May 10, 1995
Jetstream Model 4101 Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Jetstream Model 4101 airplanes, that requires installation of new case drain pipes and an additional fairlead support for the hydraulics case drain line in the rear spar area of the engine/ nacelle. This amendment is prompted by reports of fatigue failure of the case drain line in the hydraulics system. The actions specified by the proposed AD are intended to prevent the loss of main system hydraulics as a result of lack of support against vibration and subsequent fatigue failure of the case drain line for the hydraulics system.
AD 95-05-01 · published Apr 13, 1995, effective Apr 13, 1995
BAE Systems (Operations) Limited Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to all British Aerospace Model BAe 146-100A, -200A, and -300A series airplanes, that requires conducting closed loop tests to determine the setting of the underfrequency trip level on suspect generator control units (GCU), and either the correction of discrepancies or replacement of the GCU. This amendment is prompted by several malfunctions of in-service GCU's due to the effects of setting the underfrequency trip level too high. The actions specified by this AD are intended to correct GCU's that may have the underfrequency level set too high, which could result in the unwanted shut down of an electrical generator; this condition may lead to loss of all generated electrical power on the airplane when other generator faults or failures occur.
AD 95-05-02 · published Apr 13, 1995, effective Apr 13, 1995
Airbus SAS Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A300 and A300-600 series airplanes, that requires modification of the fuel tank jettison system. This amendment is prompted by a quality survey which revealed that the electrical bonding of the fuel jettison system has insufficient protection from a lightning strike. The actions specified by this AD are intended to prevent electrical arcing and resultant fire in the event of a lightning strike.
AD 95-06-01 · published Apr 13, 1995, effective Apr 13, 1995
The Boeing Company Airplanes
AD 95-06-53 · published Apr 14, 1995, effective May 1, 1995
Boeing Model 737 Series Airplanes
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) T95-06-53 that was sent previously to all known U.S. owners and operators of Boeing Model 737 series airplanes by individual telegrams. This AD requires identification of the part and serial numbers of the main rudder power control unit (PCU), and replacement of certain PCU's with serviceable parts, if necessary. This amendment is prompted by reports indicating that certain modified rudder PCU's malfunctioned and failed functional retesting. The actions specified by this AD are intended to prevent the rudder actuator piston and the rudder from operating with reduced force capability or moving in a direction opposite the intended direction due to malfunctioning of the rudder PCU; these conditions could result in reduced controllability of the airplane.
AD 95-08-07 · published Apr 17, 1995, effective May 2, 1995
Airbus Model A310 Series Airplanes
This amendment adopts a new airworthiness directive (AD) that is applicable to all Airbus Model A310 series airplanes. This action 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 is prompted by a report that, during routine maintenance, excessive force was required to lift the interior control handle of the emergency exit door. The actions specified in 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 95-08-04 · published Apr 18, 1995, effective May 18, 1995
The Boeing Company Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Model DC-9-80 series airplanes and Model MD-88 airplanes, that requires an inspection to detect damage, burn marks, or discoloration at certain electrical plugs and receptacles of the sidewall lighting in the passenger cabin, and correction of discrepancies. This amendment would also require modification of the electrical connectors, which, when accomplished, would terminate the inspection requirement. This amendment is prompted by reports of failures of the electrical connectors in the sidewall fluorescent lighting, which resulted in smoke or lighting interruption in the passenger cabin. The actions specified by this AD are intended to prevent failures of the electrical connectors, which could result in poor socket/pin contact, excessive heat, electrical arcing, and subsequently, connector burn through and smoke in the passenger cabin.
AD 95-08-05 · published Apr 18, 1995, effective May 18, 1995
BAE Systems (Operations) Limited Airplanes
This amendment supersedes an existing airworthiness directive (AD), applicable to certain British Aerospace Model BAe 146-100A, -200A, and -300A series airplanes, that currently requires repetitive inspections of the attachment bolts and nuts in the rear spar root joint attachment fittings at wing rib 2 for integrity of nuts, tightness of bolts, and/or fuel leaks; and repair, if necessary. That AD was prompted by fuel leaks from bolt positions on the rear spar attachment fitting at wing rib 2. This amendment provides for an optional terminating modification for the repetitive inspections, and expands the applicability of the existing AD to include additional airplanes. The actions specified by this AD are intended to prevent fuel leaks and a subsequent fire.
AD 95-08-06 · published Apr 18, 1995, effective May 18, 1995
Textron Aviation Inc. Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Raytheon Corporate Jets Models DH/BH/HS/BAe 125-1A to -700A series, BAe 125-800A, and Hawker 800 series airplanes, that requires replacement of the existing standby static inverter with an inverter that incorporates a circuit board assembly sealed with a conformal coating. This amendment is prompted by reports of failure of the standby static inverter caused by electrical shorting from moisture condensing on the printed circuit boards (PCB), due to aberrations in the PCB conformal coating. The actions specified by this AD are intended to prevent malfunction of the standby static inverter due to exposure to moisture caused by inadequate insulation coating of the circuit board assembly. Malfunction or failure of the standby static inverter, when its use is necessary, could result in the loss of electric power for certain equipment critical to safety of flight.
AD 95-06-52 · published Apr 21, 1995, effective Apr 21, 1995
328 Support Services GmbH Airplanes
AD 95-08-11 · published Apr 24, 1995, effective May 24, 1995
Boeing Model 767 Series Airplanes Equipped With Off-Wing Escape Slides
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 767 series airplanes, that requires replacement of the currently installed door opening actuators of the emergency off-wing escape system with new, improved actuators. This amendment is prompted by reports indicating that the requirements of a previously issued AD do not adequately preclude leakage from these actuators. The actions specified by this AD are intended to prevent failure of the escape slide to deploy due to failure of the door opening/snubbing actuator, which could delay and possibly jeopardize successful emergency evacuation of an airplane.
AD 95-09-01 · published Apr 26, 1995, effective May 26, 1995
Boeing Model 737-300, -400, and -500 Series Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 737-300, -400, and -500 series airplanes, that requires an inspection to determine the type of topcoat material currently on the insulation of the inner wall of the fan duct cowl (the firewall) of the thrust reversers, and application of an improved topcoat material, if necessary. This amendment is prompted by tests, which demonstrated that flames can penetrate the firewall if certain combinations of insulation and topcoat materials are used. The actions specified by this AD are intended to prevent failure of the fireproof insulation top coat installed on the firewalls of the thrust reverser fan cowls, which could result in degradation or loss of the firewall and lead to an uncontained engine fire.
AD 95-09-04 · published Apr 28, 1995, effective May 30, 1995
Bombardier Inc. Airplanes
This amendment adopts a new airworthiness directive (AD), applicable to certain de Havilland Model DHC-8-100 and -300 series airplanes, that requires an inspection to verify the integrity of the shield grounds for the cable harness of the electronic engine control (EEC), and correction of any discrepancy. This amendment also requires measurement of the electrical resistance of certain shield grounds, and repair, if necessary. This amendment is prompted by a report of an engine flameout after a lightning strike, due to several shields for the cable harness of the EEC not being properly grounded to the airframe. The actions specified by this AD are intended to prevent engine flameout due to insufficient protection of the EEC.
AD 95-09-05 · published Apr 28, 1995, effective May 15, 1995
British Aerospace Model Avro 146-RJ Series Airplanes
This amendment adopts a new airworthiness directive (AD) that is applicable to certain British Aerospace Model Avro 146-RJ series airplanes. This action requires a revision to the FAA-approved Airplane Flight Manual (AFM) to alert the flightcrew of the potential for significant delays in the Honeywell Standard Windshear Detection and Recovery Guidance System (WSS) detecting windshear when the flaps of the airplane are in transition. This amendment is prompted by a report of an accident during which an airplane encountered severe windshear during a missed approach. The actions specified in this AD are intended to ensure that the flightcrew is aware that there may be significant delays in the WSS detecting windshear when the flaps of the airplane are in transition.
AD 94-26-07 · published Apr 3, 1995, effective Apr 18, 1995
Honeywell International Inc. Engines
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 94-26-07 that was sent previously to all known U.S. owners and operators of AlliedSignal Inc. TPE331 series turboprop engines by individual letters. This AD requires an amendment to the Emergency Procedures section of the applicable FAA Approved Airplane Flight Manual (AFM) for each applicable engine installation in an aircraft, and initial and repetitive dimensional inspections of the fuel control drive shaft splines for wear, or replacing the affected fuel controls with alternate fuel controls. This amendment is prompted by reports of excessive wear of the internal fuel control drive splines in fuel controls, which can result in loss of fuel control governor drive. The actions specified by this AD are intended to prevent an uncontained engine failure, damage to the aircraft, or loss of aircraft control.
AD 95-08-03 · published Apr 12, 1995, effective Jun 12, 1995
General Electric Company CF6 Series Turbofan Engines
This amendment adopts a new airworthiness directive (AD), applicable to General Electric Company (GE) CF6-45/-50 series turbofan engines, that requires reduction of the low cycle fatigue (LCF) retirement lives for certain high pressure turbine rotor (HPTR) stage 2 disks, and would provide a drawdown schedule for those affected parts with reduced LCF retirement lives. 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 published LCF retirement lives. The actions specified by this AD are intended to prevent a LCF failure of the HPTR stage 2 disk, which could result in an uncontained engine failure and damage to the aircraft.
AD 91-10-03 R1 · published Apr 13, 1995, effective Apr 28, 1995
General Electric Company (GE) CF6-45 and CF6-50 Series Turbofan Engines
This amendment revises an existing airworthiness directive (AD), applicable to General Electric Company (GE) CF6-45 and CF6-50 series turbofan engines, that currently requires repetitive inspections of high pressure compressor (HPC) rear shafts, and also requires installation of a certain rear shaft flange bolt configuration . This amendment clarifies that engines with a Parts Manufacturer Approval (PMA) bolt part number (P/N) installed must accomplish the inspection requirements of the AD, and allow the installation of the PMA bolt in lieu of the GE bolt. This amendment is prompted by the omission of the PMA bolt P/N from the current AD requirements. The actions specified by this AD are intended to prevent an HPC rear shaft fracture, which could result in an inflight engine shutdown and an uncontained engine failure.
AD 95-07-02 · published Apr 18, 1995, effective Jun 19, 1995
AlliedSignal Inc. TFE731-3 Series Turbofan Engines
This amendment adopts a new airworthiness directive (AD), applicable to AlliedSignal Inc. (formerly Garrett Turbine Engine Company) TFE731-3 series turbofan engines, that requires the removal of suspect low pressure turbine (LPT) disks due to their susceptibility to creep fatigue. This amendment is prompted by reports of LPT disks that have separated through the disk web due to creep fatigue. The actions specified by this AD are intended to prevent an LPT disk web separation, which may result in an uncontained engine failure and damage to the aircraft.
AD 95-08-14 · published Apr 24, 1995, effective May 9, 1995
Honeywell International Inc. Engines
This amendment adopts a new airworthiness directive (AD) that is applicable to AlliedSignal, Inc. (formerly Textron Lycoming) LTS101 series turboshaft engines. This action requires a one-time replacement of magnetic speed pickups in the engine electronic overspeed protection system, or inspection, and replacement, if necessary, of pickups with incorrect polarity. This amendment is prompted by reports of a manufacturing error that resulted in improper sensor polarity of magnetic speed pickups. The actions specified in this AD are intended to prevent the engine electronic overspeed protection system from failing to function as designed, which can result in the inability to arrest an uncontrolled power turbine (PT) rotor overspeed and damage to the aircraft.
AD 95-09-02 · published Apr 25, 1995, effective May 10, 1995
AlliedSignal Engines (Formerly Textron Lycoming) LTS101 Series Turboshaft and LTP101 Series Turboprop Engines
This amendment adopts a new airworthiness directive (AD) that is applicable to AlliedSignal Engines (formerly Textron Lycoming) LTS101 series turboshaft and LTP101 series turboprop engines. This action supersedes priority letter AD 94-19-01 that currently requires initial and repetitive inspections for wear of the engine fuel pump internal drive splines, and replacement of engine fuel pumps that exhibit wear beyond specified limits. This action clarifies the original requirements of the current AD by providing additional information to emphasize that the AD only applies to engines installed on single-engine aircraft and to emphasize that removed fuel pumps must be returned to the manufacturer for inspection. In addition, this action defines a serviceable part. This amendment is prompted by requests to clarify interpretations of the current priority letter AD. The actions specified by this AD are intended to prevent engine fuel pump failure, which can result in total engine power loss and possible loss of the aircraft.
AD 95-07-03 · published Apr 3, 1995, effective May 3, 1995
AlliedSignal Aerospace GTCP85 Series Auxiliary Power Units
This amendment adopts a new airworthiness directive (AD), applicable to AlliedSignal Aerospace (formerly Garrett Auxiliary Power Division and Garrett Turbine Engine Co.) GTCP85 series auxiliary power units (APU), that requires modifying the APU to install an exhaust centerbody. This amendment is prompted by reports of two uncontained APU failures where turbine wheel fragments exited the APU exhaust axially and damaged the aircraft. The actions specified by this AD are intended to prevent an axially uncontained APU failure and damage to the aircraft.
