Airworthiness Directive · Amendment 39-11565 · Rolls-Royce plc RB211-524H-36 Series Turbofan Engines
Rolls-Royce plc RB211-524H-36 Series Turbofan Engines
Rolls-Royce plc (R-R) RB211-524H-36 series turbofan engines installed on but not limited to Boeing 767 series airplanes.
Note 1: This airworthiness directive (AD) applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
This amendment adopts a new airworthiness directive (AD) that is applicable to Rolls-Royce plc RB211-524H-36 series turbofan engines. This action requires, prior to further flight, installing an improved combustion liner with a strengthened head and improved heat shields. This amendment is prompted by a report of burn through of a combustor case that led to burning away of the thrust reverser and translating cowl and subsequent fire damage to the engine pylon. The actions specified in this AD are intended to prevent burn through of the combustor case due to combustion liner cracking, which can result in an engine fire and damage to the aircraft.
To prevent burn through of the combustor case due to combustor liner cracking, which can result in an engine fire and damage to the aircraft, accomplish the following:
(a) Prior to further flight, install an improved combustion liner with a strengthened head and improved heat shields, in accordance with the Accomplishment Instructions of R-R Service Bulletin (SB) No. RB.211-72-9764, Revision 3, dated January 16, 1998.
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.
Engines
