Airworthiness Directive · Amendment 39-21263 · Turbine engine compressor section
Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce plc) Turbofan Engines
Superseded. A later AD replaced this one: AD 2022-08-16. Comply with the one in force.
This AD applies to all:
(1) 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.
(2) RRD Trent 7000-72 and Trent 7000-72C 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, Trent 1000-R3, Trent 7000-72, and Trent 7000-72C model turbofan engines. This AD was prompted by a report of crack findings in the front air seal on the intermediate-pressure compressor (IPC) shaft assembly during the stripping of a flight test engine. This AD requires initial and repetitive borescope inspections (BSIs) or visual inspections of the IPC shaft assembly and, depending on the results of the inspection, replacement of the IPC shaft assembly with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Within the compliance times specified in Table 1 to paragraph (g)(1) of this AD, and thereafter, at intervals not to exceed 200 flight cycles (FCs), perform a borescope inspection (BSI) of the IPC shaft assembly, part number KH18436, using the Accomplishment Instructions, paragraph 3.B., of Rolls-Royce (RR) Trent 1000 Alert Non-Modification Service Bulletin (NMSB) 72-AK451, Initial Issue, dated November 14, 2019.
(2) An in-shop BSI of the IPC shaft assembly using the Accomplishment Instructions, paragraph 3.A, of RR Trent 1000 Alert NMSB 72-AK451, Initial Issue, dated November 14, 2019, or visual inspection of the IPC shaft assembly using FAA-approved maintenance procedures if the part is exposed, may be substituted for any on-wing BSI, provided the compliance time specified in paragraph (g)(1) of this AD is not exceeded.
(3) If, during any initial or repetitive BSI or visual inspection of the IPC shaft assembly required by paragraph (g)(1) or (2) of this AD, any crack is detected, before further flight, remove the IPC shaft assembly and replace it with a part eligible for installation.
For the purpose of this AD, a “part eligible for installation” is:
(1) An IPC shaft assembly that is new (not previously installed on an engine);
(2) An IPC shaft assembly that, before (re)installation, has passed a BSI (no crack detected) using the Accomplishment Instructions, paragraph 3.A. or B., of RR Trent 1000 Alert NMSB 72-AK451, Initial Issue, dated November 14, 2019.
(3) An IPC shaft assembly that, before (re)installation, has passed a visual inspection of the exposed part (no crack detected) using FAA-approved maintenance procedures.
The reporting requirements in the Accomplishment Instructions, paragraphs 3.A. and 3.B., of RR Trent 1000 Alert NMSB 72-AK451, Initial Issue, dated November 14, 2019, are not required by 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.
Engines
