Airworthiness directives › 2008-25-01
AD 2008-25-01 Airworthiness Directives; Rolls-Royce plc RB211 Trent 500 Series Turbofan Engines
Applicability*9
This AD applies to Rolls-Royce plc RB211 Trent 553-61, 553A2-61, 556-61, 556A2-61, 556B-61, 556B2-61, 560-61, and 560A2-61 turbofan engines with a low-pressure turbine (LPT) stage 3 disc, part number (P/N) FK29581, installed. These engines are installed on, but not limited to, Airbus A340-500 and A340-600 series airplanes. Reason (d) European Aviation Safety Agency (EASA) AD No. 2008-0098, dated May 21, 2008, states the unsafe condition as follows: Recent analysis of the LPT discs 1-5 carried out by Rolls-Royce plc concluded that it is necessary to reduce the declared safe cyclic life of all Trent 500 LPT stage 3 discs, P/N FK29581. Rolls-Royce plc has reduced the declared safe cyclic life of these LPT stage 3 discs to 7,990 cycles-since-new (CSN). We are issuing this AD to prevent an uncontained failure of the LPT stage 3 disc, resulting in damage to the airplane.
Compliance
After the effective date of this AD, remove LPT stage 3 discs, P/N FK29581, from service before reaching the new reduced declared safe cyclic life of 7,990 CSN. (f) Do not install an LPT stage 3 disc, P/N FK29581, onto any engine, unless it has been verified that the disc has not yet accumulated 7,990 CSN. Alternative Methods of Compliance (AMOCs) (g) The Manager, Engine Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Related Information (h) Refer to EASA Airworthiness Directive 2008-0098, dated May 21, 2008, and Rolls-Royce plc Alert Service Bulletin No. RB.211-72-AF781, dated April 2, 2008, for related information. Contact Rolls-Royce plc, P.O. Box 31, Derby, England, DE248BJ; telephone: 011-44-1332-242424; fax: 011-44-1332-245418, for the alert service bulletin. (i) Contact James Lawrence, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: james.lawrence@faa.gov; telephone (781) 238-7176; fax (781) 238-7199, for more information about this AD. Issued in Burlington, Massachusetts, on November 24, 2008. Francis A. Favara, Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. E8-28549 Filed 12-1-08; 8:45 am] BILLING CODE 4910-13-P
Required actions
After the effective date of this AD, remove LPT stage 3 discs, P/N FK29581, from service before reaching the new reduced declared safe cyclic life of 7,990 CSN. (f) Do not install an LPT stage 3 disc, P/N FK29581, onto any engine, unless it has been verified that the disc has not yet accumulated 7,990 CSN. Alternative Methods of Compliance (AMOCs) (g) The Manager, Engine Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Related Information (h) Refer to EASA Airworthiness Directive 2008-0098, dated May 21, 2008, and Rolls-Royce plc Alert Service Bulletin No. RB.211-72-AF781, dated April 2, 2008, for related information. Contact Rolls-Royce plc, P.O. Box 31, Derby, England, DE248BJ; telephone: 011-44-1332-242424; fax: 011-44-1332-245418, for the alert service bulletin. (i) Contact James Lawrence, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: james.lawrence@faa.gov; telephone (781) 238-7176; fax (781) 238-7199, for more information about this AD. Issued in Burlington, Massachusetts, on November 24, 2008. Francis A. Favara, Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. E8-28549 Filed 12-1-08; 8:45 am] BILLING CODE 4910-13-P
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