Airworthiness Directive · Amendment 39-21102 · Turbine section
Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce plc) Turbofan Engines
This AD applies to all Rolls-Royce Deutschland Ltd. & Co KG (RRD) (Type Certificate Previously Held by Rolls-Royce plc) Trent 1000-AE3, Trent 1000-CE3, Trent 1000-D3, Trent 1000-G3, Trent 1000-H3, Trent 1000-J3, Trent 1000-K3, Trent 1000-L3, Trent 1000-M3, Trent 1000-N3, Trent 1000-P3, Trent 1000-Q3, and Trent 1000-R3 model turbofan engines.
The FAA is adopting a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd. & Co KG (RRD) Trent 1000-AE3, Trent 1000- CE3, Trent 1000-D3, Trent 1000-G3, Trent 1000-H3, Trent 1000-J3, Trent 1000-K3, Trent 1000-L3, Trent 1000-M3, Trent 1000-N3, Trent 1000-P3, Trent 1000-Q3, and Trent 1000-R3 model turbofan engines. This AD requires initial and repetitive borescope inspections (BSI) of the high-pressure turbine (HPT) blades. This AD also requires replacement of HPT blades with parts eligible for installation when the HPT blades fail inspection or reach the new life limit. This AD was prompted by the manufacturer identifying that the HPT blades may fail prematurely. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Before exceeding the compliance time specified in Table 1 to paragraph (g)(1) of this AD, and thereafter at intervals not to exceed 50 HPT blade flight cycles (FCs) since the last inspection, perform an on-wing borescope inspection (BSI) of the HPT blades, part number (P/N) KH10575 (pre-mod/SB 72-J550), or P/N KH64485 (post-mod/SB 72-J550), for cracks.
(i) Use Accomplishment Instructions, paragraph 3.C., of RR Alert NMSB Trent 1000 72-AK316, Revision 3, dated July 16, 2019, to perform the BSI.
(ii) [Reserved]
(2) Within 10 engine FCs after in-flight shutdown (IFSD) of an engine, perform an on-wing BSI of the HPT blades, P/N KH10575 (pre-mod/SB 72-J550), or P/N KH64485 (post-mod/SB 72-J550), for cracks on the not-affected (no IFSD) engine installed on that airplane.
(i) Use Accomplishment Instructions, paragraph 3.C., of RR Alert NMSB Trent 1000 72-AK316, Revision 3, dated July 16, 2019.
(ii) [Reserved]
(3) Remove the full set of HPT blades if any individual HPT blade is found cracked during the on-wing BSI required by paragraph (g)(1) or (2) and replace with a full HPT blade set eligible for installation within the compliance time specified in Table 2 to paragraph (g)(3) of this AD.
(4) Remove the full set of HPT blades, P/N KH10575 (pre-mod/SB 72-J550), or P/N KH64485 (post-mod/SB 72-J550), after the effective date of this AD, as follows.
(i) Before accumulating 1,000 HPT blade FCs on any engine, or
(ii) Before both engines installed on the airplane accumulate a combined total of 1,400 HPT blade FCs.
For the purpose of this AD, “HPT blade FCs” are the FCs accumulated by the engine since first flight, or since the last installation of a full set of new HPT blades, whichever occurs 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.
Engines
