AD 2011-13-01 Airworthiness Directives; Rolls-Royce plc (RR) RB211-524 Series Turbofan Engines

This AD applies to RB211-524D4-19, -524D4-B-19, -524D4-39, -524D4-B-39, -524D4X-19, -524D4X-B-19, -524H-36, -524H2-19, -524H-T-36, -524H2-T-19, -524G2-19, -524G3-19, -524G2-T-19, and -524G3-T-19 engines with thrust reverser units (TRUs) that have a part number (P/N) specified in paragraph 1.A. of RR Alert Service Bulletin (ASB) RB.211-78-AG084, Revision 5, dated February 4, 2011, installed. These engines are installed on, but not limited to, Boeing 747 series and 767 series airplanes. Reason (d) The EASA AD 2009-0253, dated November 30, 2009, states the following: An investigation into the loss of a TRU during landing has revealed that this incident was preceded by the detachment of the TRUs fixed structure front ring rivet lines on the rear flange. It was concluded that the loss of rivet lines was directly associated with a previous translating cowl gearbox stubshaft fracture and the subsequent repair of the fixed structure to Engine Manual repair No. FRS5887. This repair instructs the replacement of the damaged section of the structure but does not require the rivets adjacent to the repair to be replaced although latest analysis has shown that the rivets may have weakened as a result of a translating cowl gearbox stubshaft failure. We are issuing this AD to prevent failure of the attachment rivets resulting in loss of engine structural integrity, which may result in release of the thrust reverser unit from the engine. (e) If no repairs were performed as a result of a stubshaft failure, no further action is necessary.

Unless already done, do the following actions: (1) If the TRU has previously had engine manual repair No. FRS5887 and either engine manual repair No. FRS4976 or engine manual repair No. FRS6669 as a result of a translating cowl gearbox stubshaft failure, then perform the actions specified in Section 3. Accomplishment Instructions of RR ASB RB.211-78-AG084, Revision 5, dated February 4, 2011, within 215 cycles-in-service (CIS) after the effective date of this AD. (2) If the TRU has previously only had engine manual repair No. FRS5887 as a result of a translating cowl gearbox stubshaft failure, then perform the actions specified in Section 3. Accomplishment Instructions of RR ASB RB.211-78-AG084, Revision 5, dated February 4, 2011, within 2,225 CIS after the effective date of this AD. Previous Credit (g) Actions specified in paragraph (f)(1) and (f)(2) of this AD that are performed using RR ASB RB.211-78-AG084, Revision 4, dated December 22, 2009, RR ASB RB.211-78-AG084, Revision 3, dated November 6, 2009, comply with paragraph (f)(1) and (f)(2) of this AD. FAA AD Differences (h) This AD differs from the Mandatory Continuing Airworthiness Information (MCAI) and/or service information as follows: (1) For engines on which the TRU was previously repaired using either engine manual repair No. FRS4976 or engine manual repair No. FRS6669 and engine manual repair FRS5887 as a result of a translating cowl gearbox stubshaft failure, the MCAI requires compliance before March 31, 2010. This AD requires compliance within 215 cycles-in-service (CIS) after the effective date of this AD. (2) For engines on which the TRU was previously repaired using engine manual repair No. FRS5887 only, the MCAI requires compliance before December 31, 2012. This AD requires compliance within 2,225 CIS after the effective date of this AD. Other FAA AD Provisions Alternative Methods of Compliance (AMOCs) (i) 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 (j) Refer to MCAI EASA Airworthiness Directive 2009-0253, dated November 30, 2009, for related information. (k) Contact Alan Strom, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: alan.strom@faa.gov; telephone (781) 238-7143; fax (781) 238-7199, for more information about this AD. Material Incorporated by Reference (l) You must use Rolls-Royce (RR) Alert Service Bulletin (ASB) RB.211-78-AG084, Revision 5, dated February 4, 2011, to do the actions required by this AD, unless the AD specifies otherwise. (1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact Rolls-Royce plc, P.O. Box 31, Derby, DE24 8BJ, United Kingdom; telephone 011 44 1332 242424; fax 011 44 1332 249936. (3) You may review copies at the FAA, New England Region, 12 New England Executive Park, Burlington, MA; or 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 . Issued in Burlington, Massachusetts, on June 8, 2011. Peter A. White, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 2011-16954 Filed 7-7-11; 8:45 am] BILLING CODE 4910-13-P

Unless already done, do the following actions: (1) If the TRU has previously had engine manual repair No. FRS5887 and either engine manual repair No. FRS4976 or engine manual repair No. FRS6669 as a result of a translating cowl gearbox stubshaft failure, then perform the actions specified in Section 3. Accomplishment Instructions of RR ASB RB.211-78-AG084, Revision 5, dated February 4, 2011, within 215 cycles-in-service (CIS) after the effective date of this AD. (2) If the TRU has previously only had engine manual repair No. FRS5887 as a result of a translating cowl gearbox stubshaft failure, then perform the actions specified in Section 3. Accomplishment Instructions of RR ASB RB.211-78-AG084, Revision 5, dated February 4, 2011, within 2,225 CIS after the effective date of this AD. Previous Credit (g) Actions specified in paragraph (f)(1) and (f)(2) of this AD that are performed using RR ASB RB.211-78-AG084, Revision 4, dated December 22, 2009, RR ASB RB.211-78-AG084, Revision 3, dated November 6, 2009, comply with paragraph (f)(1) and (f)(2) of this AD. FAA AD Differences (h) This AD differs from the Mandatory Continuing Airworthiness Information (MCAI) and/or service information as follows: (1) For engines on which the TRU was previously repaired using either engine manual repair No. FRS4976 or engine manual repair No. FRS6669 and engine manual repair FRS5887 as a result of a translating cowl gearbox stubshaft failure, the MCAI requires compliance before March 31, 2010. This AD requires compliance within 215 cycles-in-service (CIS) after the effective date of this AD. (2) For engines on which the TRU was previously repaired using engine manual repair No. FRS5887 only, the MCAI requires compliance before December 31, 2012. This AD requires compliance within 2,225 CIS after the effective date of this AD. Other FAA AD Provisions Alternative Methods of Compliance (AMOCs) (i) 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 (j) Refer to MCAI EASA Airworthiness Directive 2009-0253, dated November 30, 2009, for related information. (k) Contact Alan Strom, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: alan.strom@faa.gov; telephone (781) 238-7143; fax (781) 238-7199, for more information about this AD. Material Incorporated by Reference (l) You must use Rolls-Royce (RR) Alert Service Bulletin (ASB) RB.211-78-AG084, Revision 5, dated February 4, 2011, to do the actions required by this AD, unless the AD specifies otherwise. (1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact Rolls-Royce plc, P.O. Box 31, Derby, DE24 8BJ, United Kingdom; telephone 011 44 1332 242424; fax 011 44 1332 249936. (3) You may review copies at the FAA, New England Region, 12 New England Executive Park, Burlington, MA; or 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 . Issued in Burlington, Massachusetts, on June 8, 2011. Peter A. White, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 2011-16954 Filed 7-7-11; 8:45 am] BILLING CODE 4910-13-P