Airworthiness Directive · Amendment 39-19758 · Turbine engine, turbine section
Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce plc) Turbofan Engines
This AD applies to Rolls-Royce Deutschland Ltd. & Co KG (Type Certificate previously held by Rolls-Royce plc) (RRD) Trent 1000-A, Trent 1000-A2, Trent 1000-AE, Trent 1000-AE2, Trent 1000-AE3, Trent 1000-C, Trent 1000-C2, Trent 1000-CE, Trent 1000-CE2, Trent 1000-CE3, Trent 1000-D, Trent 1000-D2, Trent 1000-D3, Trent 1000-E, Trent 1000-E2, Trent 1000-G, Trent 1000-G2, Trent 1000-G3, Trent 1000-H, Trent 1000-H2, Trent 1000-H3, Trent 1000-J2, Trent 1000-J3, Trent 1000-K2, Trent 1000-K3, Trent 1000-L2, Trent 1000-L3, Trent 1000-M3, Trent 1000-N3, Trent 1000-P3, Trent 1000-Q3 and Trent 1000-R3 model turbofan engines, with an engine serial number (ESN) listed in Appendix 1, 2, or 3 of Rolls-Royce plc (RR) Alert Non-Modification Service Bulletin (NMSB) Trent 1000 72-AK186, Revision 2, dated April 16, 2019, except those engines that have incorporated the modifications in RR Service Bulletin (SB) Trent 1000 72-H818, dated November 14, 2016, or RR SB Trent 1000 72-J559, dated November 27, 2017.
The FAA is superseding airworthiness directive (AD) 2018-15-01 for certain Rolls-Royce plc (RR) Trent 1000-A, Trent 1000-C, Trent 1000-D, Trent 1000-E, Trent 1000-G, Trent 1000-H, Trent 1000-A2, Trent 1000-C2, Trent 1000-D2, Trent 1000-E2, Trent 1000-G2, Trent 1000-H2, Trent 1000-J2, Trent 1000-K2, and Trent 1000-L2 model turbofan engines. AD 2018-15-01 required certain engines susceptible to intermediate- pressure turbine (IPT) blade failure not be installed on an airplane together with other engines with IPT blades of the same cyclic life. This AD requires removal of the IPT blade set at lower cyclic life limits and replacing it with a blade set eligible for installation. This AD also expands the applicability to include additional Trent 1000 turbofan engine models. This AD was prompted by the determination that certain IPT blades are susceptible to shank corrosion which leads to cracking and possible blade separation. The FAA is issuing this AD to address the unsafe condition on these products.
(1) For engines with an ESN listed in Appendix 1 of RR Alert NMSB Trent 1000 72-AK186, Revision 2, dated April 16, 2019 (“RR Alert NMSB Trent 1000 72-AK186”), prior to reaching the blade cycle life limit listed in Appendix 1 of RR Alert NMSB Trent 1000 72-AK186, or within 30 days of the effective date of this AD, whichever occurs later, remove the IPT blade set and replace with an IPT blade set eligible for installation.
(2) For engines with an ESN listed in Appendix 2 of RR Alert NMSB Trent 1000 72-AK186:
(i) If the engine is in an engine shop visit on the effective date of this AD, remove the IPT blade set and replace with an IPT blade set eligible for installation prior to returning the engine to service; or
(ii) If the engine is not in an engine shop visit on the effective date of this AD and the IPT blade set was not replaced during the previous engine shop visit, remove the IPT blade set and replace with an IPT blade set eligible for installation within 30 days of the effective date of this AD.
(3) For engines that have replaced the IPT blade set per RR NMSB Trent 1000 72-J442, Revision 3, dated October 8, 2018, or RR NMSB Trent 1000 72-J465, Revision 4, dated October 8, 2018, as applicable, remove and replace those blades prior to reaching the “Permitted Cycles of operation since installation in accordance with NMSB 72-J442 or 72-J465” listed in Appendix 3 of RR Alert NMSB Trent 1000 72-AK186, as applicable for each ESN, or within 30 days of the effective date of this AD, whichever occurs later.
Note 1 to paragraph (g): An IPT blade set eligible for installation is a full set of new IPT blades, or a full set of blades that have been inspected per RR NMSB Trent 1000 72-J442, Revision 3, dated October 8, 2018, or RR NMSB Trent 1000 72-J465 Revision 4, October 8, 2018, as applicable by engine model.
For the purpose of this AD, an “engine shop visit” is the induction of an engine into the shop for maintenance involving the separation of pairs of major mating engine case flanges, except that the separation of engine flanges solely for the purposes of transportation without subsequent engine maintenance does not constitute an engine shop visit.
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
