Airworthiness Directive · Amendment 39-16540 · Exhaust
The Boeing Company Model 777-200 Series Airplanes
Superseded. A later AD replaced this one: AD 2020-05-24. Comply with the one in force.
This AD applies to The Boeing Company Model 777-200 series airplanes, certificated in any category; as identified in Boeing Alert Service Bulletin 777-78A0066, Revision 2, dated April 8, 2010.
We are adopting a new airworthiness directive (AD) for certain Model 777-200 series airplanes. This AD requires installing a new insulation blanket on the latch beam firewall of each thrust reverser (T/R) half. This AD results from an in-flight shutdown due to an engine fire indication; an under-cowl engine fire was extinguished after landing. The cause of the fire was uncontained failure of the starter in the engine core compartment; the fire progressed into the latch beam cavity and was fueled by oil from a damaged integrated drive generator oil line. We are issuing this AD to prevent a fire from entering the cowl or strut area, which could weaken T/R parts and result in reduced structural integrity of the T/R, possible separation of T/R parts during flight, and consequent damage to the airplane and injury to people or damage to property on the ground.
Comply with this AD within the compliance times specified, unless already done.
Within 60 months or 4,500 flight cycles after the effective date of this AD, whichever is first: Install a new insulation blanket on the latch beam firewall of each T/R half by doing all the applicable actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin 777-78A0066, Revision 2, dated April 8, 2010.
Actions done before the effective date of this AD in accordance with Boeing Alert Service Bulletin 777-78A0066, dated June 5, 2008; or Boeing Service Bulletin 777-78A0066, Revision 1, dated March 12, 2009; are acceptable for compliance with the corresponding requirements of paragraph (g) of this AD.
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
