Airworthiness Directive · Amendment 39-19046 · Turbine engine compressor section
Rolls-Royce plc Turbofan Engines
This AD applies to Rolls-Royce plc (RR) RB211 Trent 553-61, Trent 553A2-61, Trent 556-61, Trent 556A2-61, Trent 556B-61, Trent 556B2-61, Trent 560-61, and Trent 560A2-61 turbofan engines with an engine serial number (ESN) listed in Section 1.A., Effectivity, of RR Alert Non Modification Service Bulletin (NMSB) RB.211-72-AJ451, Revision 1, dated March 10, 2017.
We are adopting a new airworthiness directive (AD) for certain Rolls-Royce plc (RR) RB211 Trent 553-61, Trent 553A2-61, Trent 556-61, Trent 556A2-61, Trent 556B-61, Trent 556B2-61, Trent 560-61, and Trent 560A2-61 turbofan engines. This AD requires replacement of the low- pressure compressor (LPC) case A-frame hollow locating pins. This AD was prompted by LPC case A-frame hollow locating pins that may have reduced integrity due to incorrect heat treatment. We are issuing this AD to correct the unsafe condition on these products.
At the next scheduled maintenance inspection after the effective date of this AD, but no later than January 1, 2018, replace each affected LPC case A-frame hollow locating pin with a part eligible for installation using Section 3, Accomplishment Instructions, of RR Alert NMSB RB.211-72-AJ451, Revision 1, dated March 10, 2017.
After the effective date of this AD, do not install any engine with an affected LPC case A-frame hollow locating pin.
For the purposes of this AD:
(1) An affected LPC case A-frame hollow locating pin is part number (P/N) FK32009, except those with an original RR authorized release certificate dated July 5, 2016, or later.
(2) A part eligible for installation is an LPC case A-frame hollow locating pin with an original RR authorized release certificate dated July 5, 2016, or later.
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.
