Airworthiness directives › 2018-13-07
AD 2018-13-07 Airworthiness Directives; Rolls-Royce plc Turbofan Engines
Applicability*9
This AD applies to all Rolls Royce plc (RR) Trent 1000-A, Trent 1000-C, Trent 1000-D, Trent 1000-E, Trent 1000-G, and Trent 1000-H turbofan engine models.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Inspect the IPC stage 1 rotor blades, at the applicable compliance times specified in paragraphs (g)(1)(i), (ii), or (iii) after the effective date of this AD, whichever comes first: (i) Within 30 days for the serial number IPC modules installed in the referenced serial number engines listed in Group 1 in Appendix 1 of RR Alert Non-Modification Service Bulletin (NMSB) Trent 1000 72-AK130, dated June 11, 2018, using the Accomplishment Instructions, paragraph 3.A.(1)(a), of RR Alert NMSB Trent 1000 72-AK130, dated June 11, 2018. (ii) Within 60 days for all IPC modules not listed in Group 1 in Appendix 1 of RR Alert NMSB Trent 1000 72-AK130, dated June 11, 2018, using the Accomplishment Instructions, paragraph 3.A.(1)(a), of RR Alert NMSB Trent 1000 72-AK130, dated June 11, 2018. Those serial number IPC modules specifically identified in Group 2 in Appendix 1 of RR Alert NMSB Trent 1000 72-AK130, dated June 11, 2018, do not require inspection. (iii) At the next engine shop visit, using the Accomplishment Instructions, paragraph 3.A.(2)(a), of RR Alert NMSB Trent 1000 72-AK130, dated June 11, 2018. (2) For IPC modules with 1,000 or more flight cycles, inspect the IPC stage 2 rotor blades and IPC stage 2 dovetail posts within 30 days of the effective date of this AD or at the next engine shop visit, whichever comes first. (i) For IPC stage 2 rotor blades and IPC stage 2 dovetail posts inspected on-wing, use Accomplishment Instructions, paragraphs 3.B.(1)(a) and 3.C.(1)(a), of RR Alert NMSB Trent 1000 72-AK130, dated June 11, 2018. (ii) For IPC stage 2 rotor blades and IPC stage 2 dovetail posts inspected in shop, use Accomplishment Instructions, paragraphs 3.B.(2)(a) and 3.C.(2)(a), of RR Alert NMSB Trent 1000 72-AK130, dated June 11, 2018. (3) For engines that are in an engine shop visit on the effective date of this AD, inspect IPC stage 1 rotor blades, IPC stage 2 rotor blades, and IPC stage 2 dovetail posts before returning the engine to service. (4) If any IPC stage 1 rotor blade, IPC stage 2 rotor blade, or an IPC shaft stage 2 dovetail post is found cracked during any inspection required by this AD, remove the part from service and replace the part with a part eligible for installation before further flight.
Unsafe condition
This AD was prompted by reports of intermediate-pressure compressor (IPC) rotor blade cracks, which could lead to separations resulting in engine failures. We are issuing this AD to prevent failure of the IPC. The unsafe condition, if not addressed, could result in failure of one or more engines, loss of thrust control, and loss of the airplane.
Affected ADs
None.
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