Results
95-03-03: This amendment adopts a new airworthiness directive (AD) that is applicable to Hartzell Propeller Inc. Model HC-B4TN-3/T10173F(N)(B,K)-12.5 and HC-B4TN-3A/T10173F(N)(B,K)- 12.5 propellers installed on Beech A100 and A100A aircraft. This action requires an initial and repetitive inspections, and specified rework or retirement, as necessary, of the propeller hub assemblies and propeller blades. This amendment is prompted by a determination that the current hub design and blade repair limits do not adequately protect against initiation of fatigue cracks in the propeller hub arm bore and do not prevent the resonant speed of the propeller from shifting into the permitted ground idle operating range. The actions specified in this AD are intended to prevent initiation of fatigue cracks in the propeller hub arm bore and subsequent progression to failure, with departure of the hub arm and blade, that may result in loss of aircraft control.
2018-19-03: We are adopting a new airworthiness directive (AD) for certain Fokker Services B.V. Model F28 Mark 0070 and 0100 airplanes. This AD was prompted by a report of cracks, in various directions, in the lower portion of a main landing gear (MLG) piston. This AD requires a detailed visual inspection of the MLG, and replacement if necessary. We are issuing this AD to address the unsafe condition on these products.
94-25-07: This amendment supersedes an existing telegraphic airworthiness directive (AD), applicable to Pratt & Whitney (PW) JT8D series turbofan engines, that currently requires repetitive ultrasonic inspections of a combustion chamber outer case (CCOC) weld, but also allows visual inspection or fluorescent magnetic penetrant inspection (FMPI) of certain CCOC's under specified conditions. This amendment allows ultrasonic inspections only. This amendment is prompted by the greater availability of ultrasonic inspection equipment, which provides a more definitive means of discovering cracks than either visual inspections or FMPI. The actions specified by this AD are intended to prevent rupture of the CCOC, which could result in fire, engine cowl release, or aircraft damage.
2008-07-08: 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 \1/8\-inch rivets installed in place of the correct \5/32\-inch rivets that secure the horizontal tail surface load transfer angles to the rearmost fuselage frame at Station 384.62. We are issuing this AD to require actions to correct the unsafe condition on these products.
95-02-14: This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-9-10, -20, -30, -40, and -50 series airplanes, and Model C-9 (military) airplanes, that requires replacement of the engine nose cowl attaching bolts and the installation of bearing plates on the nose cowl attach ring. This amendment is prompted by incidents in which the nose cowl separated from the airplane due to the elongation and/or breakout of the nose cowl's attachment ring holes, and failure of the attaching bolts. The actions specified by this AD are intended to prevent separation of the engine nose cowl from the airplane, which could result in damage to the airplane structure or could present a hazard to persons or property on the ground.
2018-17-25: We are adopting a new airworthiness directive (AD) for all Airbus SAS Model A350-941 and -1041 airplanes. This AD was prompted by reports of uncommanded motion of the flight control actuator. This AD requires replacing certain rudder and elevator servocontrols with serviceable [[Page 46375]] servocontrols. We are issuing this AD to address the unsafe condition on these products.
2017-05-04: We are adopting a new airworthiness directive (AD) for certain Bell Helicopter Textron Canada Limited (BHTC) Model 206 helicopters. This AD requires removing certain tension-torsion straps (TT straps) from service and is prompted by reports of corroded TT straps. These actions are intended to prevent an unsafe condition on these products.
95-03-11: This amendment adopts a new airworthiness directive (AD) that is applicable to McDonnell Douglas Helicopter Systems and Hughes Helicopters, Inc. Model 369, OH-6A, and YOH-6A series helicopters. This action requires initial and repetitive inspections of the tail rotor blade abrasion strip (abrasion strip), installation of stainless steel abrasion tape over the inboard end of the abrasion strip, and as a terminating action, installation of a tail rotor blade with a new-design abrasion strip. This amendment is prompted by several incidents of riveted abrasion strips debonding and separating during flight, resulting in severe out-of-balance conditions and subsequent separation of the tail rotor gearbox from the helicopter. The actions specified in this AD are intended to prevent loss of the abrasion strip, separation of a tail rotor blade, separation of the tail rotor gearbox, and subsequent loss of control of the helicopter.
2008-07-02: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: Installation of G-load monitoring units on some Z 43 series aeroplanes has revealed that certain aeroplanes, during aerobatic manoeuvres, exceeded the limit loads initially defined for the certification. As a consequence, to restore the safety margins on aeroplanes operated in Utility ("U'') category, this AD mandates a modification of the Airplane Flight Manual (AFM) so as to change and limit the permissible manoeuvres in "U'' category flights. This AD requires actions that are intended to address the unsafe condition described in the MCAI.
2001-15-14: This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A330 and A340 series airplanes, that requires installation of a retainer device on the attachment pin of the brake torque rod of the main landing gear (MLG). The actions specified by this AD are intended to prevent the attachment pin from fully migrating from the brake torque rod and to prevent the collar from detaching from the MLG; these conditions could result in loss of braking on two wheels and the inability to extend the MLG. This action is intended to address the identified unsafe condition.
2018-17-24: We are adopting a new airworthiness directive (AD) for certain Airbus SAS Model A350-941 airplanes. This AD was prompted by the discovery of inadequate corrosion protection in certain areas of the horizontal stabilizer and the rear fuselage cone structure. This AD requires application of sealant and protective treatment on the affected areas of the horizontal stabilizer and the rear fuselage cone structure and, for certain airplanes, modification of the trimmable horizontal stabilizer (THS) torsion box and re-identification of the elevator. We are issuing this AD to address the unsafe condition on these products.
95-02-07: This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747 series airplanes, that requires installation of a seal on the wing front spar at each engine strut. This amendment is prompted by a report of a fire that occurred due to fuel leakage from the fuel line coupling in the engine strut area along the wing front spar while the airplane was on the ground after engine shutdown. The actions specified by this AD are intended to ensure that fuel is contained within the strut drainage area and channeled away from ignition sources.
2008-06-27: We are adopting a new airworthiness directive (AD) for certain Goodrich evacuation systems approved under Technical Standard Orders (TSOs) TSO-C69, TSO-C69a, TSO-C69b, and TSO-C69c, installed on certain Boeing, McDonnell Douglas, and Airbus transport category airplanes. For certain systems, this AD requires replacing the evacuation system's shear-pin restraints with new ones. For certain other systems, this AD requires an inspection for manufacturing lot numbers; and a general visual inspection of the shear-pin restraint for discrepancies, and corrective actions if necessary. This AD results from several reports of corroded shear-pin restraints that prevented Goodrich evacuation systems from deploying properly. We are issuing this AD to prevent failure of an evacuation system, which could impede an emergency evacuation and increase the chance of injury to passengers and flightcrew during the evacuation. \n\nDATES: This AD is effective April 28, 2008. \n\tThe Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of April 28, 2008. \n\tThe Director of the Federal Register approved the incorporation by reference of a certain other publication listed in this AD as of March 11, 2008 (73 FR 6586, February 5, 2008).
2001-15-11: This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A300 B2; A300 B4; A300 B4-600, B4-600R, and F4-600R (collectively called A300-600); A310; A319; A320; A321; A330; and A340 series airplanes, that requires replacement of Labinal actuators in certain powered cockpit seats with new improved actuators. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil aviation authority. The actions specified by this AD are intended to prevent uncommanded horizontal movement of the cockpit seats or loss of ability to lock the seats in place during flight, which could limit the ability of the crew to perform necessary tasks, leading to reduced controllability of the airplane.
95-02-18: This amendment supersedes Airworthiness Directive (AD) 92-06-09, which currently requires repetitively inspecting the engine trusses for cracks on Beech Aircraft Corporation (Beech) Model 1900 and certain Model 1900C airplanes, repairing or replacing any cracked engine truss, and installing reinforcement doublers. That AD also provides the option of installing an engine truss of improved design as terminating action for the repetitive inspections. Since issuing that AD, the Federal Aviation Administration (FAA) has received several reports of these improved design trusses cracking in Area A (as specified in the service information) of the engine truss. This action retains the currently required repetitive inspections, but shortens the repetitive inspection interval in Area A and eliminates the inspection-terminating replacement option; and also incorporates the Beech Models 1900C and 1900D airplanes that have engine trusses of this same type design installed at manufacture.The actions specified by this AD are intended to prevent failure of the engine truss assembly caused by a cracked engine truss.
2008-06-24: We are adopting a new airworthiness directive (AD) for certain Boeing Model 737-300, -400, and -500 series airplanes. This AD requires an inspection to determine the manufacturer and manufacture date of the oxygen masks in the passenger service unit and the lavatory and attendant box assemblies, corrective action if necessary, and other specified action. This AD results from a report that several passenger masks with broken in-line flow indicators were found following a mask deployment. We are issuing this AD to prevent the in-line flow indicators of the passenger oxygen masks from fracturing and separating, which could inhibit oxygen flow to the masks and consequently result in exposure of the passengers and cabin attendants to hypoxia following a depressurization event.
2001-15-13: This amendment adopts a new airworthiness directive (AD), applicable to all Airbus Model A310 series airplanes, that requires repetitive inspections of the metallic vapor seals in the center fuel tank to detect holes, tears, or a change in shape; corrective action, if such damage is detected; and follow-up tests for leaks. This amendment is prompted by reports of damaged metallic vapor seals observed during routine maintenance. This action is necessary to detect and correct damage to the metallic vapor seal in the center fuel tank, which could lead to leakage of fuel from the center tank into the air conditioning pack bay located below the center tank, providing a potential for fuel to be in contact with fuel ignition sources. This action is intended to address the identified unsafe condition.
2020-11-13: The FAA is superseding Airworthiness Directive (AD) 2010-23- 04, which applied to all De Havilland Aircraft of Canada Limited Model DHC-8-400 series airplanes. AD 2010-23-04 required repetitive detailed inspections of the nacelle attachment fittings for cracks, a conductivity inspection of the nacelle attachment fittings, and replacement if necessary. This AD continues to require these inspections and replacement if necessary, removes a certain inspection requirement for certain airplanes, and adds a new requirement to replace the rear spar fitting and nacelle attaching structure with a new nacelle attachment fitting. This AD was prompted by a determination that it is necessary to do a replacement with new nacelle attachment fittings. The FAA is issuing this AD to address the unsafe condition on these products.
2008-06-25: 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 A330 operators have reported that the guide shaft of the Refuel Isolation Valve has been broken away from the main casting and entered the fuel tank. The Supplier Investigation evidenced that water builds-up in the cavity of the Refuel Isolation Valve and freezes during flight. When refuel pressure is applied to the piston, the ice restricts the piston travel on one side leading to an asymmetric movement of the piston resulting in breakage of the guide shaft. A non-bonded metallic object within the fuel tank can result [in] a potential ignition source, which in combination with a lightning strike constitutes an unsafe condition. We are issuing this AD to require actions to correct the unsafe condition on these products.
2018-18-13: We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This AD was prompted by reports of cracking in certain flanges, and the adjacent web, of the wing outboard flap track at certain positions, and a determination that new inspections of certain flap track flanges and webs forward of the rear spar attachment are necessary. This AD requires an inspection to determine the part number of the wing outboard flap track assembly; repetitive inspections of each affected wing outboard flap track for discrepancies, and applicable on-condition actions; and repetitive overhaul of each wing outboard flap track. We are issuing this AD to address the unsafe condition on these products.
95-02-16: This amendment supersedes an existing airworthiness directive (AD), applicable to certain Pratt & Whitney (PW) JT8D series turbofan engines, that currently requires initial and repetitive inspections of the Number 7 fuel nozzle and support assembly, replacement of the Number 7 fuel nozzle and support assembly with a more leak-resistant configuration, and replacement of aluminum oil pressure and scavenge tube fittings with steel fittings. This amendment adds a requirement incorporated in a new revision of a PW Alert Service Bulletin (ASB) that was omitted from the existing AD to replace an additional aluminum oil scavenge line bolt with a steel bolt. This amendment also makes a correction to a note in the compliance section to apply only to PW JT8D-200 series engines. This amendment is prompted by the need to make these corrections. The actions specified by this AD are intended to prevent fuel leakage from the Number 7 fuel nozzle and support assembly, ignition of that leaking fuel, and liberation of oil from melted oil line fittings, which can result in an uncontained engine fire and damage to the aircraft.
2017-20-09: We are adopting a new airworthiness directive (AD) for all General Electric Company (GE) CF34-8E model turbofan engines. This AD was prompted by a report that using a certain repair procedure for the fan outlet guide vane (OGV) frame could alter the strength capability of the fan OGV frame. This AD requires replacement of all fan OGV frames [[Page 46670]] repaired using this procedure. We are issuing this AD to address the unsafe condition on these products.
95-02-10: This amendment adopts a new airworthiness directive (AD) that is applicable to certain Boeing Model 757 series airplanes. This action requires replacement of the bolts, nuts, and washers that attach the support bracket at the Number 4 and Number 5 transmissions to the wing flap structure. This amendment is prompted by a report of damage to the left inboard trailing edge flap. The actions specified in this AD are intended to prevent these airplanes from taking off with broken bolts that attach the transmission bracket to the wing flap track structure, which could result in the airplane rolling at liftoff.
95-02-02: This amendment adopts a new airworthiness directive (AD), applicable to McDonnell Douglas Model DC-9 and DC-9-80 series airplanes, Model MD-88 airplanes, and Model C-9 (military) airplanes, that requires inspection of the tailcone release locking cable fitting assembly, and replacement or modification of the assembly, if necessary. This amendment is prompted by reports of the inability of the tailcone to deploy because the swaged ball on the cable had jammed after passing into the release handle hole. The actions specified by this AD are intended to prevent the inability of the tailcone to deploy, which could impede the egress of passengers from the airplane during an emergency evacuation.
94-26-13: This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 737-300, -400, and -500 series airplanes. This action requires modification of the leading edge slat access panel and internal structure at Front Spar Station (FSS) 250.663. This amendment is prompted by reports that fuel leaking from the fuel line at FSS 250.663 flowed through a drain hole in a slat access panel and leaked into the turbine exhaust area. The actions specified in this AD are intended to prevent drainage from such a fuel leak into the turbine exhaust area, which could cause an external fire under the wing.