2010-13-09: Stage 3 low-pressure turbine (LPT)

2010-13-09 CFM International, S.A.: Amendment 39-16340. Docket No. FAA-2010-0026; Directorate Identifier 2010-NE-03-AD. Effective Date (a) This airworthiness directive (AD) becomes effective July 26, 2010. Affected ADs (b) None. Applicability (c) This AD applies to: (1) CFM International CFM56-5, -5B, and -7B series turbofan engines with stage 3 low-pressure turbine (LPT) disks part number (P/N) 336-002-006-0, installed with the following serial numbers (S/ Ns), DE255844, DE256388, DE256622, DE256623, DE256625, DE256627, DE256628, DE256631, and DE256637. (2) CFM International, S.A. has stated that none of these affected disk S/Ns were originally installed on any CFM56-5 turbofan engine, however, that disk P/N is certified for use on CFM56-5 engines. (3) The -5 and -5B series engines are installed on, but not limited to, Airbus A318, A319, A320, and A321 airplanes, and the -7B series engines are installed on, but not limited to, Boeing 737 series airplanes. Unsafe Condition (d) This AD results from the discovery of a material nonconformity requiring removal of the disk before the certified disk life of certain stage 3 LPT disks. We are issuing this AD to prevent uncontained failure of the stage 3 LPT disk and damage to the airplane. Compliance (e) You are responsible for having the actions required by this AD performed within the compliance time specified unless the actions have already been done. Removal of Affected Stage 3 LPT Disks From Service (f) Before accumulating 9,500 cycles-since-new, remove stage 3 LPT disks from service. (g) After the effective date of this AD, do not reinstall any stage 3 LPT disk removed from service per paragraph (f) of this AD into any engine. Alternative Methods of Compliance (h) The Manager, Engine Certification Office, has the authority to approve alternative methods of compliance for this AD if requested using the procedures found in 14 CFR 39.19. Related Information (i) Contact Antonio Cancelliere, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: antonio.cancelliere@faa.gov; telephone (781) 238-7751; fax (781) 238-7199, for more information about this AD. (j) European Aviation Safety Agency AD 2009-0270, dated December 17, 2009, also addresses the subject of this AD. (k) CFM International, S.A. Service Bulletin (SB) No. CFM56-5B S/B 72-0733, dated October 26, 2009, and SB No. CFM56-7B S/B 72- 0743, dated October 26, 2009, pertain to the subject of this AD. Contact CFM International, Technical Publications Department, 1 Neumann Way, Cincinnati, OH 45215; telephone (513) 552-2800; fax (513) 552-2816, for a copy of this service information. Material Incorporated by Reference (l) None.