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2014-15-14: We are superseding Airworthiness Directive (AD) 89-12-10, for certain The Boeing Company Model 747 airplanes. AD 89-12-10 required replacement of certain underwing fuel tank access doors with stronger, fire-resistant doors. This new AD requires inspecting certain fuel tank access doors for installation of impact-resistant doors, and stencils and index markers; corrective actions if necessary; revising the maintenance program to incorporate certain new airworthiness limitations; and adding airplanes to the applicability. This AD was prompted by a report of a standard access door installed instead of an impact-resistant access door and stencils missing from some impact- resistant access doors and adjacent wing skin. We are issuing this AD to prevent foreign object penetration of the fuel tank, which could cause a fuel leak near an ignition source (e.g., hot brakes or engine exhaust nozzle), consequently leading to a fuel-fed fire.
2005-01-02: The FAA is adopting a new airworthiness directive (AD) for certain Lockheed Model 1329 series airplanes. This AD requires repetitive inspections to detect crack damage in the front spar cap assembly of the lower vertical stabilizer; reworking the spar cap doublers if no crack damage is found during any inspection; and repairing if any crack damage is found during any inspection. This AD is prompted by reports of cracks in the front spar cap assembly of the lower vertical stabilizer at box beam station 24 on the aft side of the 25% chord line. We are issuing this AD to find and fix cracks in the front spar cap assembly of the lower vertical stabilizer, which could result in rapid crack propagation and failure of the front spar cap. Failure of the front spar cap could lead to loss of rudder control and consequent reduced controllability of the airplane.
88-04-09: 88-04-09 BOEING: Amendment 39-5854. Applies to Model 767 series airplanes, as listed in Boeing Service Bulletin 767-36-0021, dated September 17, 1987, certificated in any category. Compliance required within the next six months after the effective date of this AD, unless already accomplished. \n\n\tTo preclude engine or pneumatic system damage caused by failure of the pneumatic system 8th stage check valve, accomplish the following: \n\n\tA.\tWithin the next 6 months after the effective date of this AD, inspect the pneumatic system 8th stage check valves on both engines, in accordance with Boeing Service Bulletin 767-36-0021, dated September 17, 1987, or later FAA-approved revision, to determine if the serial numbers are among those listed in Hamilton Standard Service Bulletin 36-2056, dated June 29, 1987, or later FAA-approved revision, as requiring further inspection. \n\n\tB.\tIf any valve is identified by serial number as requiring further inspection, prior to further flight, remove the valve from the airplane, inspect the valve retention collar and, if necessary, modify the valve in accordance with the above mentioned service bulletins. \n\n\tC.\tValves not installed on an airplane must be inspected, and modified if necessary, in accordance with the above-mentioned service bulletins, prior to their installation on airplanes. \n\n\tD.\tAn alternate means of compliance or adjustment of the compliance time, which provide an acceptable level of safety, and which has the concurrence of an FAA Principal Maintenance Inspector, may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. \n\n\tE.\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of the rework required by this AD. \n\n\tAll persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to the Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124-2207. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. \n\n\tThis amendment becomes effective April 5, 1988.
86-14-01: 86-14-01 SPERRY CORPORATION, AEROSPACE AND MARINE GROUP: Amendment 39-5340. Applies to Sperry Corporation AHZ-600 Attitude Heading Reference System (AHRS), known to be installed in, but not limited to, DeHavilland Model DHC-8, British Aerospace Model BAe 125-800, Cessna Model 650, and Aerospatiale Model ATR-42 series airplanes, certificated in any category. Compliance is required within 30 days after the effective date of this AD, unless previously accomplished. To prevent loss of attitude/heading reference information, accomplish the following: A. Modify the Sperry Corporation AH-600 Strapdown Attitude and Heading Reference Unit (AHRU) by incorporating modifications in accordance with the following Sperry Service Bulletins or later revisions approved by the Manager, Western Aircraft Certification Office, FAA, Northwest Mountain Region: 21-1985-175, dated April 7, 1986 (Modification T); 21-1985-186, dated April 7, 1986 (Modifications S & V); 21-1985-187,dated April 7, 1986 (Modification U); 21-1986-19, dated April 22, 1986 (Modification Z); 21-1986-20, dated April 22, 1986 (Modification AA); and 21-1986-29, dated April 22, 1986 (Modification AB). B. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, Western Aircraft Certification Office, FAA, Northwest Mountain Region. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Sperry Corporation, Aerospace & Marine Group, P.O. Box 29000, Phoenix, Arizona 85038-9000. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Western Aircraft Certification Office,15000 Aviation Boulevard, Hawthorne, California. This amendment becomes effective July 14, 1986.
2005-01-01: This amendment supersedes an existing airworthiness directive (AD), applicable to certain Airbus Model A319 and A320-200 series airplanes, that currently requires repetitive inspections to detect loose, missing, or discrepant rivets in specified areas of the door frames of the overwing emergency exits; measurement of the grip length of all rivets in the specified areas; and corrective action if necessary, which terminates the repetitive inspections. This new amendment also requires an inspection for correct dimensions of the interior countersinks of the rivet holes, and related corrective action. The actions specified by this AD are intended to prevent loose, missing, or discrepant rivets, which could lead to reduced structural integrity of the door frames of the overwing emergency exits. This action is intended to address the identified unsafe condition.
2023-10-09: The FAA is adopting a new airworthiness directive (AD) for all The Boeing Company Model 787-8, 787-9, and 787-10 airplanes. This AD was prompted by reports of damaged decompression panels from operators. This AD requires repetitive inspections for damaged fastener holes on the vertical and bottom edges of the inward and outward blowing decompression panels installed on the forward and aft cargo compartment vertical sidewall linings and applicable on-condition actions. The FAA is issuing this AD to address the unsafe condition on these products.
2023-11-06: The FAA is adopting a new airworthiness directive (AD) for certain Engine Alliance (EA) Model GP7270, GP7272, and GP7277 engines. This AD was prompted by a manufacturer investigation that revealed that certain high-pressure turbine (HPT) interstage seals were manufactured from material suspected to contain iron inclusion. This AD requires replacement of the affected HPT interstage seals. The FAA is issuing this AD to address the unsafe condition on these products.
82-06-04: 82-06-04 CANADAIR: Amendment 39-4344. Applies to Model CL-600 airplanes serial numbers 1005, 1007, 1011 thru 1013, and 1016 thru 1019, certificated in all categories. To prevent jamming of the main entry door unlatching system, accomplish the following, unless already accomplished. 1. Within the next 25 hours time in service after the effective date of this AD, perform the door handle operation check and handle adjustments described in paragraph 2 of Canadair Alert Service Bulletin A600-0077 dated July 27, 1981. 2. Replace the existing clear plastic handle guard, Part Number 600-31710-1, with guard assembly, Part Number 600-31772-1, in accordance with paragraph 2 of Canadair Alert Service Bulletin A600-0074 dated July 20, 1981. 3. Ensure that the internal door "EMERGENCY EXIT" placard located to the left hand side of the inner door handle is an approved placard reading as follows: EMERGENCY EXIT PULL AND TURN HANDLE TO "OPEN" PUSH DOOR 4.Airplanes may be flown in accordance with FAR 21.197 to a maintenance base for accomplishment of the inspection required by this AD. 5. Alternate methods of compliance with this AD may be used when they provide an equivalent level of safety and are approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Mountain Region. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). This amendment becomes effective March 22, 1982.
2000-09-11: This amendment adopts a new airworthiness directive (AD), applicable to certain Fokker Model F.28 Mark 0070 series airplanes. This action requires a one-time inspection to detect loose bolts attaching the gustlock counter-bracket to the pulley on the elevator tension regulator assembly, and corrective action, 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 prevent restricted elevator movement and consequent reduced controllability of the airplane.
2005-01-05: The FAA is superseding an existing airworthiness directive (AD), which applies to certain EMBRAER Model EMB-135 and EMB-145 series airplanes. That AD currently requires replacing the nose landing gear wheel nuts and associated inner and outer seals, and reidentifying the landing gear strut. This new AD adds an airplane to the applicability and revises a part number for a replacement part. This AD is prompted by a report of an invalid part number for the new nose landing gear wheel nut. We are issuing this AD to prevent separation of the wheels from the nose landing gear due to the failure of the outer wheel bearings, and consequent loss of control of the airplane during takeoff and landing.