Airworthiness Directive · Amendment 39-19522 · Engine exhaust
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 777-200 and -300 series airplanes, certificated in any category, equipped with Rolls-Royce Model RB211-Trent 800 engines, on which the actions specified in Boeing Alert Service Bulletin 777-78A0094 have been incorporated, and the condition specified in paragraph (c)(1) or (c)(2) of this AD is met on any engine, or both conditions specified in (c)(1) and (c)(2) of this AD are met on any engine.
(1) Thermal protection system (TPS) non-re-contoured insulation blankets having part numbers (P/N) 315W5115-2, -6, or -20 are installed on the thrust reverser (T/R) inner wall.
(2) Rolls-Royce Service Bulletin RR.211-71-H824, dated July 30, 2014, has not been incorporated on the engine.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200 and -300 series airplanes equipped with Rolls-Royce Model RB211-Trent 800 engines. This AD was prompted by reports of inadequate clearance between the thermal protection system (TPS) insulation blankets and the electronic engine control (EEC) wiring, which resulted in damaged wires. This AD requires repetitive inspections of the EEC wire bundles and clips, and corrective actions if necessary. We are issuing this AD to address the unsafe condition on these products.
Within 2,000 flight hours since the most recent EEC wire bundle inspection done as specified in Boeing Special Attention Service Bulletin 777-78-0071; or Boeing Service Bulletin 777-78-0082; or within 500 flight hours after the effective date of this AD, whichever occurs later: Do a detailed inspection for damage of the EEC wire bundles and clips, and do all applicable corrective actions, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-78-0082, Revision 1, dated June 15, 2015. Do all applicable corrective actions before further flight. Repeat the inspection thereafter at intervals not to exceed 2,000 flight hours.
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
