Results
95-11-01: This amendment supersedes an existing airworthiness directive (AD), applicable to Turbomeca Arriel 1 series turboshaft engines, that currently requires repetitive checks for engine rubbing noise during gas generator shutdown, and for free rotation of the gas generator by rotating the compressor manually after the last flight of the day. This amendment continues to require these checks, but eliminates the reference to the Turbomeca service bulletin, allows the pilot to perform all the checks required in this AD, clarifies the inspection interval requirement for daily checks, and specifies terminating action for the repetitive checks required by this AD. In addition, this AD allows the check for engine rubbing noise to be performed during engine motoring, and specifies that the engine turbine (T4) temperature must be below 150 degrees Centigrade when performing the check for free rotation. This amendment is prompted by comments submitted by operators of the affected enginesin response to the existing AD and the availability of an improved design 2nd stage nozzle guide vane. The actions specified by this AD are intended to prevent engine failure due to rubbing of the 2nd stage turbine disk on the 2nd stage turbine nozzle guide vane, which could result in complete engine failure and damage to the aircraft.
2018-20-05: We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 727C, 727-100, 727-100C, 727-200, and 727-200F series airplanes. This AD was prompted by the results of a fleet survey, which revealed cracking in bulkhead frame webs at a certain body station. This AD requires repetitive inspections of the bulkhead frame web at a certain body station and applicable on-condition actions. We are issuing this AD to address the unsafe condition on these products.
95-10-15: This amendment adopts a new airworthiness directive (AD), applicable to certain British Aerospace Model BAe 146-100A, -200A, -300A and Model Avro 146-RJ70A, -RJ85A, and -RJ100A airplanes, that requires repetitive inspections to verify proper deployment of the evacuation slide at each door position, and various follow-on actions to correct discrepancies. This amendment is prompted by a report that, during operational checks of evacuation slides on in- service airplanes, the inflation valves failed to deploy the evacuation slide properly. The actions specified by this AD are intended to prevent failure of the evacuation slide to deploy automatically on demand, which would necessitate the flightcrew to manually deploy the slide; this situation could delay or impede the evacuation of passengers during an emergency.
2008-09-25: 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: Bombardier Aerospace has completed a system safety review of the aircraft fuel system against fuel tank safety standards introduced in Chapter 525 of the Airworthiness Manual through Notice of Proposed Amendment (NPA) 2002-043. The identified non-compliances were then assessed using Transport Canada Policy Letter No. 525-001, to determine if mandatory corrective action is required. The assessment showed that it is necessary to introduce Critical Design Configuration Control Limitations (CDCCL), in order to preserve critical fuel tank system ignition source prevention features during configuration changes such as modifications and repairs, or duringmaintenance actions. Failure to preserve critical fuel tank system ignition source prevention features could result in a fuel tank explosion. * * * We are issuing this AD to require actions to correct the unsafe condition on these products.
2020-16-16: The FAA is adopting a new airworthiness directive (AD) for Pacific Aerospace Limited Model 750XL airplanes. 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 the outer race of bearing migrating out of the aileron pivot fork on the control column. The FAA is issuing this AD to address the unsafe condition on these products.
2001-17-07: This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model MD-11 series airplanes, that requires replacement of the insulation blankets of the forward and center cargo compartments in the area of the cargo control units (CCU) with new insulation blankets. This action is necessary to protect against electrical failures in the CCUs, which could result in sparks or flame in the CCU container and lead to fire in the insulation blanket or adjacent equipment. This action is intended to address the identified unsafe condition.
95-10-17: This amendment adopts a new airworthiness directive (AD) that is applicable to all Lockheed Model L-1011-385 series airplanes. This action requires inspections to detect cracking or severing of the fuselage frames, and an additional inspection or repair, if necessary. This amendment is prompted by reports indicating that fatigue cracking was found on certain fuselage frames on these airplanes. The actions specified in this AD are intended prevent reduced structural integrity of the fuselage shell due to the problems associated with fatigue cracking.
2008-09-11: We are adopting a new airworthiness directive (AD) for all Boeing Model 777-200, -300, and -300ER series airplanes. This AD requires a one-time inspection to determine the material of the forward and aft gray water drain masts. For airplanes having composite gray water drain masts, this AD also requires installation of a bonding jumper between a ground and the clamp on the tube of the forward and aft gray water composite drain masts. This AD results from a report of charred insulation blankets and burned wires around the forward gray water composite drain mast found during an inspection of the forward cargo compartment on a Model 767-300F airplane. We are issuing this AD to prevent a fire near a composite drain mast and possible disruption of the electrical power system due to a lightning strike on a composite drain mast, which could result in the loss of several functions essential for safe flight.
95-10-11: This amendment adopts a new airworthiness directive (AD) that is applicable to General Electric Company (GE) CF6-80C2 series turbofan engines. This action requires an initial and repetitive brake holding torque check of the fan reverser center drive unit (CDU), visual inspection of the translating cowl inner bondment seal, and functional check of the translating cowl auto re-stow system. This action also requires removal and replacement of certain CDU's as a terminating action to the repetitive check and inspection program. This amendment is prompted by a report of a CDU not able to hold the fan reverser translating cowl at the required position when manually driven to its stow position during routine maintenance. The actions specified in this AD are intended to prevent the loss of the CDU's brake holding feature, which could result in possible movement of the fan reverser translating cowl towards the deploy position in flight.
95-10-13: This amendment supersedes an existing airworthiness directive (AD), applicable to certain Boeing Model 757 series airplanes, that currently requires inspections to detect fatigue- related cracking or breakage of the hydraulic tubing support brackets located on the upper spar web in the engine struts; further inspection to detect related damage of the upper spar web, the fuel lines, and the hydraulic lines, as necessary; and repair or replacement of cracked or damaged parts. That AD was prompted by reports of fatigue-related cracks in the hydraulic tubing support brackets located on the upper spar web in the engine struts. The actions specified by that AD are intended to prevent such fatigue-related cracking, which could result in fuel or hydraulic fluid leakage into the interior of the engine strut and cause a fire. This amendment requires installation of a previously optional terminating action.