Results
2021-05-22: The FAA is adopting a new airworthiness directive (AD) for certain Safran Helicopter Engines, S.A. (Safran Helicopter Engines) Arriel 1B, Arriel 1C, Arriel 1C2, Arriel 1D1, Astazou XIV B, and Astazou XIV H model turboshaft engines. This AD was prompted by the detection of positive segregation (freckles) on Stage 2 high-pressure turbine (HPT) disks and Stage 3 turbine wheels. This AD requires removal from service of certain Stage 2 HPT disks for Safran Helicopter Engines Arriel 1B, 1C, 1C2, and 1D1 model turbofan engines and affected Stage 3 turbine wheels for Safran Helicopter Engines Astazou XIV B and XIV H model turbofan engines. The FAA is issuing this AD to address the unsafe condition on these products.
2004-03-17: This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SP, and 747SR series airplanes, that requires a one-time inspection of each emergency evacuation slide or slide/raft to determine if a certain discrepant hose assembly is installed, and replacement of the hose assembly with a new or serviceable assembly if necessary. This action is necessary to prevent the failure of an emergency evacuation slide or slide/raft to fully inflate during an emergency situation, which could impede an evacuation and result in injury to passengers or airplane crewmembers. This action is intended to address the identified unsafe condition.
2010-14-02: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: Two cases of a crack on a "dry" ADG [air driven generator] (Hamilton Sundstrand part number in the 761339 series), in the aft area of the strut and generator housing assembly, have been reported on CL-600-2B19 aircraft. The same part number is also installed on CL-600-2B16 (CL-604) aircraft. Investigation determined that the crack was in an area of the strut where the wall thickness of the casting was below specification, due to a manufacturing anomaly in a specific batch of ADGs. Structural failure and departure of the ADG during deployment could possibly result in damage to the aircraft structure. If deployment were activated by a dual engine shutdown,ADG structural failure would also result in loss of hydraulics for the flight controls. * * * * * The unsafe condition is possible loss of control of the airplane. We are issuing this AD to require actions to correct the unsafe condition on these products.
95-21-17: This amendment adopts a new airworthiness directive (AD), applicable to certain Raytheon Model Hawker 1000 and BAe 125-1000A series airplanes, that requires an inspection to detect damage to an electrical cable loom (wire bundle). This amendment also requires tying back the loom with a cable tie to the cable loom support bracket, and repair, if necessary. This amendment is prompted by a report indicating that damage had occurred to the electrical cable loom. The actions specified by this AD are intended to prevent incorrect fault displays in the cockpit and possible electrical systems failures, as a result of damage to the electrical cable loom.
2021-02-01: The FAA is superseding Airworthiness Directive (AD) 2015-26- 01, which applied to certain Airbus Helicopters Model AS332C1, AS332L1, AS332L2, EC225LP, AS-365N2, AS 365 N3, EC 155B, and EC155B1 helicopters with an energy-absorbing seat. AD 2015-26-01 required inspecting for the presence of labels (placards) that prohibit stowing anything under the seat, and if a label (placard) is missing or not clearly visible to each occupant, installing a label (placard). This AD retains all of the requirements of AD 2015-26-01, and also adds helicopters to the applicability and requires a modification (installing new labels (placards)). This AD was prompted by the determination that additional helicopters are affected by the unsafe condition, and that new labels (placards) are required for all affected helicopters. The FAA is issuing this AD to address the unsafe condition on these products.
96-09-25: This amendment adopts a new airworthiness directive (AD), applicable to all de Havilland Model DHC-7 and DHC-8 series airplanes, that requires revising the Airplane Flight Manual (AFM) to provide the flight crew with recognition cues for, and procedures for exiting from, severe icing conditions, and to limit or prohibit the use of various flight control devices. This amendment is prompted by results of a review of the requirements for certification of the airplane in icing conditions, new information on the icing environment, and icing data provided currently to the flight crews. The actions specified by this AD are intended to minimize the potential hazards associated with operating the airplane in severe icing conditions by providing more clearly defined procedures and limitations associated with such conditions.
2010-14-07: The FAA is superseding an existing airworthiness directive (AD), which applies to certain Model 747 airplanes. That AD currently requires repetitive inspections of the body station (BS) 2598 bulkhead, and corrective actions if necessary. That AD also currently requires a terminating modification for certain repetitive inspections and a post- modification inspection of the modified area. This new AD continues to require those actions using revised service information. For certain airplanes, this AD requires new repetitive inspections, an interim modification, and post-interim modification inspections. For certain airplanes, this AD requires replacing any previously repaired aft inner chord and reinstalling the terminating modification. For airplanes that are converted to the Model 747-400 large cargo freighter (LCF) configuration, this new AD reduces the threshold and repeat intervals of certain post-modification inspections. For all airplanes, this new AD also requires certaininspections of the upper aft outer chords and diagonal brace attachment fittings, flanges, and rods to continue after the terminating modification. This AD results from reports of cracked aft inner chords on airplanes after certain requirements of the existing AD were done. We are issuing this AD to prevent fatigue cracking of the BS 2598 bulkhead structure, which could result in inability of the structure to carry horizontal stabilizer flight loads, and loss of controllability of the airplane.
2021-02-03: The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. (Leonardo) Model AW189 helicopters. This AD requires various repetitive inspections of the main rotor (MR) damper. This AD was prompted by reports of in-service MR damper failures and the development of an improved MR damper. This condition, if not corrected, could lead to loss of the lead-lag damping function of the MR blade, possibly resulting in damage to adjacent critical rotor components and subsequent loss control of the helicopter. The actions of this AD are intended to address the unsafe condition on these products.
95-20-51: This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) T95-20-51 that was sent previously to all known U.S. owners and operators of Boeing Model 767-200 and -300 series airplanes by individual telegrams. This AD requires inspections of the lower half of the aft trunnion of the main landing gear (MLG) to detect damage, cracking, missing pieces, or corrosion; and correction of discrepancies. This amendment is prompted by a report indicating that the MLG collapsed on an airplane due to fracture of the aft trunnion outer cylinder that was caused by stress corrosion cracking. The actions specified by this AD are intended to prevent the collapse of the MLG due to the problems associated with stress corrosion cracking in the aft trunnion assembly; collapse of the MLG could lead to loss of control of the airplane during landing, taxiing, and takeoff.
2004-03-18: This amendment adopts a new airworthiness directive (AD), applicable to certain Aerospatiale Model ATR42 and ATR72 series airplanes, that requires replacement of the swinging lever spacers in the left and right leg assemblies of the main landing gear with new, improved spacers. This action is necessary to prevent propagation of fatigue cracking, which could result in failure of the spacer base and could affect the symmetrical functioning of the braking system. Asymmetrical braking could result in the airplane overrunning the runway during takeoff or landing. This action is intended to address the identified unsafe condition.
2021-03-07: The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. (Leonardo) Model AB139 and AW139 helicopters. This AD requires removing certain engine mounting rods from service and prohibits their installation on any helicopter. This AD was prompted by a report of non-conforming engine mounting rods. The actions of this AD are intended to address an unsafe condition on these products.
99-01-07: This action confirms the effective date of Airworthiness Directive (AD) 99-01-07, which applies to certain British Aerospace Jetstream Model 3101 airplanes. AD 99-01-07 requires installing additional stringers at the lower fuselage skin panels between the main and rear spar frames. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for the United Kingdom. The actions specified in this AD are intended to correct a strength deficiency in the area of the lower fuselage skin panels between the main rear spar frames, which, if not corrected, could result in reduced or loss of control of the airplane during maximum speed limit operations.
2021-03-10: The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by reports of failure of a certain fire detection and extinguishing (FIREX) control unit. This AD requires replacing FIREX control units having a certain part number. The FAA is issuing this AD to address the unsafe condition on these products.
2004-03-14: This amendment adopts a new airworthiness directive (AD), applicable to certain Bombardier Model DHC-8-102, -103, -106, -201, - 202, -301, -311, and -315 series airplanes, that requires repetitive inspections for discrepancies of certain rear spar fittings between the flex shaft of the flap secondary drive and the wing-to-fuselage structure, and corrective action if necessary. This action also provides for an optional modification of the flex shaft installation, which terminates the repetitive inspections. This action is necessary to find and fix damage and prevent subsequent failure of the rear spar fittings, which could result in loss of the wing. This action is intended to address the identified unsafe condition.
2010-13-11: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: Due to their position on the aeroplane, fuel fire shut-off valve actuators P/N [part number] 9409122 are susceptible to freezing, which has an adverse effect on the operation of the valve. Also, due to various causes, the failure rate of [fuel fire shut-off valve] actuator P/N 9409122 is higher than expected. Failure or freezing of the actuator may prevent the flight crew to close the fuel fire shut-off valve in case of an engine fire. * * * * * Due to their position on the aeroplane, fuel crossfeed valve actuators P/N 9409122 are susceptible to freezing, which has an adverse effect on the operation of the valve. This condition, if not corrected, maygenerate fuel asymmetry alerts when a valve remains in the open position after being selected closed. It may also prevent the flight crew from correcting a fuel asymmetry when a valve remains in the closed position after being selected open. One event was reported where, due to such problems, the flight crew shut down an engine in-flight and diverted the aircraft. * * * * * * * * [D]ue to their position on the aircraft, ice may form on actuators P/N 9409122 installed on fuel crossfeed valves and fuel fire shut-off valves. Tests revealed that the ice can prevent the actuator and thus the valve from operating in flight (frozen stuck). * * * * * * * * We are issuing this AD to require actions to correct the unsafe condition on these products.
95-26-03: This amendment supersedes an existing airworthiness directive (AD), applicable to Pratt & Whitney (PW) JT8D series turbofan engines, that currently requires inspection, and replacement, if necessary, of suspect 7th through 12th stage high pressure compressor (HPC) disks. This amendment adds 46 more applicable engines, revises the inspection requirements, incorporates a new PW Alert Service Bulletin (ASB), and requires reporting the results of the inspection to the manufacturer. This amendment is prompted by the identification of additional suspect engines, by the development of revised inspection intervals, and by the issuance of the new PW ASB. The actions specified by this AD are intended to prevent an uncontained HPC disk failure, which can result in damage to the aircraft.
2010-13-09: The FAA is adopting a new airworthiness directive (AD) for CFM International, S.A. CFM56-5, -5B, and -7B series turbofan engines. This AD requires removing from service, nine stage 3 low-pressure turbine (LPT) disks, identified by serial number (S/N). This AD results from the discovery of a material nonconformity requiring removal of the disk before the certified disk life of certain stage 3 LPT disks. We are issuing this AD to prevent uncontained failure of the stage 3 LPT disk and damage to the airplane.
2010-12-07: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: Reassessment of the damage tolerance analysis resulted in threshold reduction for some Structure Significant Items (SSI) of the Maintenance Review Board Report (MRBR) Airworthiness Limitations Items (ALI). Failure to inspect these structural components, according to the new threshold, could prevent a timely detection of fatigue cracking. These cracks, if not properly addressed, could adversely affect the structural integrity of the airplane. * * * * * We are issuing this AD to require actions to correct the unsafe condition on these products.
2010-12-02: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: The installation of TU250 comparator/selector (CS) boards, however, has resulted in a few occurrences of erratic engine behaviour, in the form of unexpected N1 variations and/or illumination of the "GOV'' warning light. The conclusions from an investigation by Turbom[eacute]ca are that these malfunctions are due to a lapse of quality control in the varnishing process applied to the boards, and that only boards in a specific serial number range, as defined under "Applicability'' and referred to below as the "suspect batch'', are affected. We are issuing this AD to prevent loss of automatic engine control during flight due to an uncommanded engine roll-back, which could result in the inability to continue safe flight.
2004-03-19: This amendment supersedes an existing airworthiness directive (AD), applicable to certain Airbus Model A320-111, -211, and -231 series airplanes, that currently requires repetitive inspections for cracking in the transition and pick-up angles in the lower part of the center fuselage area, and corrective action if necessary. That AD also provides for an optional terminating modification for the repetitive inspection requirements. This amendment reduces the compliance time for the inspections for cracking of the same area. The actions specified by this AD are intended to detect and correct fatigue cracking in the transition and pick-up angles of the lower part of the center fuselage, which could result in reduced structural integrity of the wing-fuselage support and fuselage pressure vessel. This action is intended to address the identified unsafe condition.
2021-03-02: The FAA is adopting a new airworthiness directive (AD) for certain General Electric Company (GE) CF6-80C2A1, CF6-80C2A2, CF6- 80C2A3, CF6-80C2A5, CF6-80C2A5F, CF6-80C2A8, CF6-80C2B1, CF6-80C2B1F, CF6-80C2B2, CF6-80C2B2F, CF6-80C2B4, CF6-80C2B4F, CF6-80C2B5F, CF6- 80C2B6, CF6-80C2B6F, CF6-80C2B6FA, CF6-80C2B7F, CF6-80C2B8F, and CF6- 80C2D1F model turbofan engines. This AD was prompted by reports of incidents that resulted in a significant fuel loss during flight and an in-flight shutdown (IFSD) of the engine. This AD requires initial and repetitive shim checks of the hydromechanical unit/main engine control (HMU/MEC) idler adapter on the accessory gearbox (AGB) assembly and, depending on the results of the shim check, possible replacement of the inserts on the HMU/MEC idler adapter. As a terminating action, this AD requires a protrusion check and a pull-out test, and the replacement of inserts on the HMU/MEC idler adapter that fail either test. The FAA is issuing this AD to address the unsafe condition on these products.
95-17-06: This amendment adopts a new airworthiness directive (AD) that applies to Mooney Aircraft Corporation (Mooney) Model M20K airplanes with a Continental TSIO-520-NB engine installed in accordance with Supplemental Type Certificate (STC) SA5691NM. This action requires repetitively inspecting the exhaust transition tube and turbo mount assembly for cracks, and replacing any part found cracked. A report of a cracked exhaust transition tube that connects the exhaust manifolds to the turbocharger inlet on one of the affected airplanes prompted this action. The actions specified by this AD are intended to prevent exhaust gases from entering the cabin heating system because of a cracked exhaust transition tube, which, if not detected and corrected, could result in hazardous levels of carbon monoxide in the airplane cabin.
2004-03-07: This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A320-111, -211, -212, and -231 series airplanes. This AD requires repetitive inspections for fatigue cracking around the fasteners attaching the pressure panel to the flexible bracket at frame 36, adjacent to the longitudinal beams on the left and right sides of the airplane; and repair as necessary. This AD would also provide an optional terminating action for the repetitive inspections. This action is necessary to detect and correct fatigue cracking around the fasteners attaching the pressure panel to the flexible bracket at the frame 36 adjacent to the longitudinal beams, which could result in reduced structural integrity and possible rapid decompression of the airplane. This action is intended to address the identified unsafe condition.
96-25-13: This amendment adopts a new airworthiness directive (AD), applicable to certain Jetstream Model 4101 series airplanes, that requires a high frequency eddy current inspection to detect cracks of the boundary angle and joint angle of the rear pressure bulkhead, and repair, if necessary. This amendment also requires modification of the rear pressure bulkhead of the fuselage. This amendment is prompted by a report of fatigue cracking in the rear pressure bulkhead of the fuselage. The actions specified by this AD are intended to prevent such fatigue cracking, which could result in reduced structural integrity of the fuselage and, consequently, lead to the rapid decompression of the pressurized area of the airplane.
2004-03-05: This amendment adopts a new airworthiness directive (AD), applicable to certain Model 777-200 series airplanes. This action requires a surface high frequency eddy current inspection of the web of the aft pressure bulkhead, repetitive inspections, and corrective action, if necessary. This action is necessary to detect and correct cracks or damage to the web of the aft pressure bulkhead, which could enlarge if undetected, leading to rapid decompression of the airplane and consequent possible loss of flight critical systems. This action is intended to address the identified unsafe condition.