Airworthiness Directive · Amendment 39-14049 · Boeing Model 777-200 and -300 Series Airplanes Equipped With Rolls Royce Model RB211 TRENT 800 Engines
Boeing Model 777-200 and -300 Series Airplanes Equipped With Rolls Royce Model RB211 TRENT 800 Engines
This AD applies to Boeing Model 777-200 and -300 series airplanes; certificated in any category; equipped with Rolls Royce Model RB211 TRENT 800 engines; as identified in Boeing Alert Service Bulletin 777-78A0059, dated February 24, 2005.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 777-200 and -300 series airplanes. This AD requires inspecting the thrust reversers for damage of the insulation blankets, the inner wall, and the compression and drag link fittings; and repair if necessary. This AD also requires applying sealant to certain areas of the thrust reverser. This AD is prompted by two reports of thrust reverser failure; investigation revealed that the inner wall of the thrust reversers had collapsed from exposure to hot engine core compartment air. We are issuing this AD to prevent failure of a thrust reverser and adjacent components and their consequent separation from the airplane, which could result in a rejected takeoff (RTO) and cause asymmetric thrust and consequent loss of control of the airplane during reverse thrust operation. If an RTO does not occur, these separated components could cause structural damage to the airplane or damage to other airplanes and possible injury to people on the ground.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Accomplish one-time detailed and special detailed inspections, as applicable, of the thrust reversers for damage of the insulation blankets, inner wall, and compression and drag link fittings, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 777-78A0059, dated February 24, 2005. Accomplish the inspection at the applicable compliance time specified in paragraph 1.E. “Compliance” of the service bulletin; except, where the service bulletin specifies a compliance time relative to the date after the release of the service bulletin, this AD requires compliance relative to the effective date of this AD.
If any damage is found during any inspection required by this AD: Before further flight, do applicable repairs and replace damaged fittings with new fittings, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 777-78A0059, dated February 24, 2005. Where the service bulletin specifies to contact Boeing for appropriate action, before further flight, do applicable repairs and replace damaged fittings with new fittings in accordance with a method approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA; or in accordance with data meeting the certification basis of the airplane approved by an Authorized Representative for the Boeing Delegation Option Authorization (DOA) Organization who the Manager, Seattle ACO, has authorized to make this finding. For a repair method to be approved by the Manager, Seattle ACO, as required by this paragraph, the Manager's approval letter must specifically reference this AD.
Before further flight after accomplishing the inspection and any applicable repair, as required by paragraphs (f) and (g) of this AD: Apply sealant to the seams of the thrust reverser insulation blankets and around the HP3 ducts, and insulate and seal the compression pad fittings, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-78-0060, dated February 24, 2005.
(i) Although Boeing Alert Service Bulletin 777-78A0059, dated February 24, 2005, specifies reporting certain information to Boeing, this AD does not require that action.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
