Airworthiness Directive · Amendment 39-17151 · 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 RB211 Trent 800 engines, as identified in Boeing Service Bulletin 777-75A0002, Revision 1, dated October 26, 2011.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200 and -300 series airplanes equipped with Rolls-Royce RB211 Trent 800 engines. This AD was prompted by reports of events related to thermal damage of the thrust reverser (T/ R) inner wall on Rolls-Royce RB211 Trent 800 engines. This AD requires replacing the bleed valve parts and tubing with new parts and tubing on the left and right engines; and installing Aero-Engine database (AEDB) software in the airplane information management system (AIMS) hardware. We are issuing this AD to prevent T/R thermal damage caused by excessive heat downstream of the 8th stage IP8 exhaust ports, which could result in T/R structural failure. This failure could result in large pieces of the T/R or adjacent components departing the airplane. A separated T/R piece could result in a rejected takeoff and cause asymmetric thrust and consequent loss of control of the airplane during reverse thrust operations. Separated components could also cause structural damage to the airplane, damage to other airplanes due to debris left on the runway, or injury to people on the ground.
Within 36 months after the effective date of this AD, replace the bleed valve parts and tubing with new parts and tubing on the left and right engines, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-75A0002, Revision 1, dated October 26, 2011; Rolls-Royce Service Bulletin RB.211-75-G466, Revision 1, including Supplement, dated June 20, 2011; or Rolls-Royce Service Bulletin RB.211-75-G466, Revision 2, including Supplement, dated November 21, 2011.
Prior to or concurrently with doing the actions required by paragraph (g) of this AD, install Aero-Engine database software, software part number 3110-BCG-00R-06, media set part number 243W0033-7, in the airplane information management system hardware, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-31- 0177, dated September 23, 2010; or Boeing Special Attention Service Bulletin 777-31-0177, Revision 1, dated October 13, 2011.
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
