Airworthiness directives › 2007-22-08
AD 2007-22-08 Airworthiness Directives; Rolls-Royce plc (RR) RB211 Trent 768-60, 772-60, 772B-60, and 772C-60 Turbofan Engines
Applicability*9
This AD applies to Rolls-Royce plc RB211 Trent 768-60, 772-60, 772B-60, and 772C-60 turbofan engines. These engines are installed on, but not limited to, Airbus A330 series airplanes. Reason (d) This action is necessary following the discovery of IP Compressor Rotor stage 2-3 interstage spacer cracking on an in-service Trent 700 engine. Stress analysis of the damaged rotor has shown a possible threat to the rotor integrity, the cracking therefore presents a potential unsafe condition. The cause of the cracking is currently under investigation. We are issuing this AD to detect cracks in the stage 2-3 interstage spacer of the IP Compressor Rotor. Cracking of the stage 2-3 interstage spacer could result in an uncontained engine failure and damage to the airplane.
Compliance
Inspect the IP compressor drum stage 2-3 interstage spacer for cracking at every shop visit as follows: Inspection In-shop (1) If the IP Compressor rotor is not removed from the IP Compressor Casing, inspect the IP compressor drum stage 2-3 interstage spacer by borescope in accordance with Rolls-Royce RB211 Propulsion System Alert Non Modification Service Bulletin RB211-72-AE753 revision 1, section 3 Accomplishment Instructions (paragraphs F and G are applicable in revision 1). (2) If the IP Compressor rotor is removed from the IP Compressor Casing inspect the IP compressor drum stage 2-3 interstage spacer by Eddy Current Inspection in accordance with Rolls-Royce RB211 propulsion System Alert Non Modification Service Bulletin RB211-72-AF197 initial issue, section 3 accomplishment Instructions. (3) IP compressor drums on which cracking is identified by the above means must be rejected from service. FAA AD Differences (f) None. Other FAA AD Provisions (g) Alternative Methods of Compliance (AMOCs): 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 2007-0136, dated May 14, 2007, for related information. (i) Contact Christopher Spinney, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: christopher.spinney@faa.gov ; telephone (781) 238-7175; fax (781) 238-7199, for more information about this AD. Material Incorporated by Reference (j) You must use the service information specified in Table 1 of this AD 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, UK, telephone: 44 (0) 1332 242424; fax: 44 (0) 1332 249936. (3) You may review copies at the FAA, New England Region, 12 New England Executive Park, Burlington, MA 01803; 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. Table 1.—Material Incorporated by Reference Service Bulletin No. Page Revision Date RB.211-72-AE753 All 1 May 24, 2005. RB.211-72-AF197 All Original December 20, 2006. Issued in Burlington, Massachusetts, on October 17, 2007. Peter A. White, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. E7-20913 Filed 10-25-07; 8:45 am] BILLING CODE 4910-13-P
Required actions
Inspect the IP compressor drum stage 2-3 interstage spacer for cracking at every shop visit as follows: Inspection In-shop (1) If the IP Compressor rotor is not removed from the IP Compressor Casing, inspect the IP compressor drum stage 2-3 interstage spacer by borescope in accordance with Rolls-Royce RB211 Propulsion System Alert Non Modification Service Bulletin RB211-72-AE753 revision 1, section 3 Accomplishment Instructions (paragraphs F and G are applicable in revision 1). (2) If the IP Compressor rotor is removed from the IP Compressor Casing inspect the IP compressor drum stage 2-3 interstage spacer by Eddy Current Inspection in accordance with Rolls-Royce RB211 propulsion System Alert Non Modification Service Bulletin RB211-72-AF197 initial issue, section 3 accomplishment Instructions. (3) IP compressor drums on which cracking is identified by the above means must be rejected from service. FAA AD Differences (f) None. Other FAA AD Provisions (g) Alternative Methods of Compliance (AMOCs): 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 2007-0136, dated May 14, 2007, for related information. (i) Contact Christopher Spinney, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: christopher.spinney@faa.gov ; telephone (781) 238-7175; fax (781) 238-7199, for more information about this AD. Material Incorporated by Reference (j) You must use the service information specified in Table 1 of this AD 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, UK, telephone: 44 (0) 1332 242424; fax: 44 (0) 1332 249936. (3) You may review copies at the FAA, New England Region, 12 New England Executive Park, Burlington, MA 01803; 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. Table 1.—Material Incorporated by Reference Service Bulletin No. Page Revision Date RB.211-72-AE753 All 1 May 24, 2005. RB.211-72-AF197 All Original December 20, 2006. Issued in Burlington, Massachusetts, on October 17, 2007. Peter A. White, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. E7-20913 Filed 10-25-07; 8:45 am] BILLING CODE 4910-13-P
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