2018-25-01: Turbine Engine Compressor Section

Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows: PART 39--AIRWORTHINESS DIRECTIVES 0 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. Sec. 39.13 [Amended] 0 2. The FAA amends Sec. 39.13 by removing airworthiness directive (AD) 2018-13-07, Amendment 39-19319 (83 FR 34758, July 23, 2018), and adding the following new AD: 2018-25-01 Rolls-Royce plc: Amendment 39-19511; Docket No. FAA-2018- 0871; Product Identifier 2018-NE-24-AD. (a) Effective Date This AD is effective December 21, 2018. (b) Affected ADs This AD replaces AD 2018-13-07, Amendment 39-19319 (83 FR 34758, July 23, 2018). (c) Applicability 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. (d) Subject Joint Aircraft System Component (JASC) Code 7230, Turbine Engine Compressor Section. (e) Unsafe Condition This AD was prompted by reports of intermediate-pressure compressor (IPC) rotor blade cracks, which could lead to rotor blade 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. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) Within 15 days of the effective date of this AD, or within the compliance times specified in Table 1 of RR Alert Non- Modification Service Bulletin (NMSB) Trent 1000 72-AK130, Revision 2, dated July 26, 2018, whichever occurs later, perform on-wing inspection of the IPC stage 1 rotor blades in accordance with paragraph 3.A.(1) of RR Alert NMSB Trent 1000 72-AK130. (2) Repeat the on-wing inspection of the IPC stage 1 rotor blades in accordance with paragraph 3.A.(1) of RR Alert NMSB Trent 1000 72-AK130, Revision 2, dated July 26, 2018, and within the compliance times specified in Table 1 of that NMSB. (3) Within 15 days of the effective date of this AD, or within the compliance times specified in Table 1 of RR Alert NMSB Trent 1000 72-AK130 Revision 2, dated July 26, 2018, whichever occurs later, perform on-wing inspection of the IPC stage 2 rotor blades and IPC shaft stage 2 dovetail posts in accordance with paragraph 3.B.(1) and 3.C.(1) of RR Alert NMSB Trent 1000 72-AK130. (4) Repeat the on-wing inspection of the IPC stage 2 rotor blades and IPC shaft stage 2 dovetail posts in accordance with paragraphs 3.B.(1) and 3.C.(1) of RR Alert NMSB Trent 1000 72-AK130, Revision 2, dated July 26, 2018, and within the compliance times specified in Table 1 of RR Alert NMSB Trent 1000 72-AK130. (5) Forthe on-wing inspection required by paragraphs (g)(1) through (4) of this AD, provided the stated thresholds and intervals are not exceeded, you may substitute: (i) An in-shop inspection of an engine or module performed in accordance with the instructions of paragraphs 3.A.2, 3.B.2, and 3.C.2 of the RR Alert NMSB Trent 1000 72-AK130, Revision 2, dated July 26, 2018; or (ii) an in-shop piece part inspection during refurbishment in accordance with the Accomplishment Instructions, paragraphs 3.B.(2)(f)(vi), 3.B.(2)(g)(v), and 3.B.(3)(d)(iii) of RR Trent 1000 NMSB 72-K132, dated June 29, 2018. (6) 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. (h) Inspection After Operation Under Asymmetric Power As of the effective date of this AD, before the next flightafter each occurrence where engine operation in asymmetric power conditions was sustained for more than 30 minutes at less than 25,000 feet, either resulting from engine power reduction, or from engine in-flight shut-down (IFSD), inspect the IPC stage 1 rotor blades, stage 2 rotor blades and IPC shaft stage 2 dovetail posts in accordance with the paragraphs 3.A.(1), 3.B.(1), and 3.C.(1) of the RR Alert NMSB Trent1000 72-AK130, Revision 2, dated July 26, 2018 on the engine that did not experience the power reduction or IFSD installed on the airplane. (i) Credit for Previous Actions You may take credit for the inspections required by paragraph (g)(1) and (3) of this AD if you performed these inspections before the effective date of this AD using RR Alert NMSB Trent 1000 72- AK130, Revision 1, dated June 29, 2018, or RR Alert NMSB Trent 1000 72-AK130, Initial Issue, dated June 11, 2018. (j) Special Flight Permits (1) Special flight permits, as described in Section 21.197 and Section 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199), are subject to the requirements of paragraph (k)(1)(i) of this AD. (i) Operators who are prohibited from further flight due to an IPC stage 1 rotor blade, IPC stage 2 rotor blade, or an IPC shaft stage 2 dovetail post being found cracked, may perform a one-time non-revenue ferry flight to a location where the engine can be removed from service. This ferry flight must be performed without passengers, involve non-extended operations (ETOPS), and consume no more than three flight cycles. (ii) [Reserved] (2) [Reserved] (k) Alternative Methods of Compliance (AMOCs) (1) The Manager, ECO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (l)(1) of this AD. You may email your request to: [email protected]. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office. (l) Related Information (1) For more information about this AD, contact Kevin M. Clark, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7088; fax: 781-238-7199; email: [email protected]. (2) Refer to European Aviation Safety Agency (EASA) AD 2018- 0167R2, dated October 16, 2018, for more information. You may examine the EASA AD in the AD docket on the internet at http://www.regulations.gov by searching for and locating it in Docket No. FAA-2018-0871. (m) Material Incorporated by Reference (1) The Director of the Federal Register approved theincorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) Rolls-Royce plc (RR) Alert Non-Modification Service Bulletin (NMSB) Trent 1000 72-AK130, Revision 2, dated July 26, 2018. [[Page 62697]] (ii) RR Alert NMSB Trent 1000 72-K132, dated June 29, 2018. (3) For RR service information identified in this AD, contact Rolls-Royce plc, Corporate Communications, P.O. Box 31, Derby, England, DE24 8BJ; phone: 011-44-1332-242424; fax: 011-44-1332- 249936; email: royce.com">[email protected]; internet: https://customers.rolls-royce.com/public/rollsroycecare. (4) You may view this service information at FAA, Engine & Propeller Standards Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call 781-238-7759. (5) You may view this service information at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.