AD 2005-01-15R1 Airworthiness Directives; Rolls-Royce plc RB211 Trent 875, 877, 884, 884B, 892, 892B, and 895 Series Turbofan Engines

(c) This AD applies to Rolls-Royce plc (RR) RB211 Trent 875, 877, 884, 884B, 892, 892B, and 895 series turbofan engines with low pressure compressor (LPC) fan blades, part numbers (P/Ns) FK30838, FK30840, FK30842, FW12960, FW12961, FW12962, and FW13175, installed. These engines are installed on, but not limited to, Boeing Company 777 series airplanes. Unsafe Condition (d) This AD revision results from a request by an operator to clarify the terminating action in AD 2005-01-15. We are issuing this AD to prevent multiple LPC fan blade failures due to cracks, which could result in uncontained engine failure and possible damage to the airplane.

(e) You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. (f) Ultrasonic-inspect and disposition the dovetail roots of LPC fan blades, P/Ns FK30838, FK30840, FK30842, FW12960, FW12961, FW12962, and FW13175, that are removed from the engine, using 3.A.(1) through 3.A.(5) or, for blades that are not removed from the engine, using 3.B.(1) through 3.B.(5) of the Accomplishment Instructions of RR Alert Service Bulletin (ASB) No. RB.211-72-AD344, Revision 7, dated March 12, 2004, as follows: (1) For blades P/Ns FK30838, FK30840, and FK30842, that have not been relubricated during any interval exceeding 600 cycles-since-new (CSN) or 600 cycles-since-rework (CSR) using either RR ASB No. RB.211-72-AD344 or Service Bulletin (SB) No. RB.211-72-D347, inspect as specified in paragraph (f) of this AD and within the compliance times specified in the following Table 1: Table 1.—Compliance Times for Blades P/Ns FK30838, FK30840, and FK30842 Engine series Boeing 777 series Airplane maximum gross weight (times 1,000 pounds) Initial inspection CSN Repetitive inspection (cycles-since-last-inspection) (CSLI) (i) -884B, -892 -300 (A) 660 and 632.5 600 80     (B) 580 2,000 600 (ii) -884, 884, -892, -892B, and -895 -200 (A) 632.5 and 648 1,200 100     (B) 656 600 80     (C) 555 2,000 600 (iii) -875 -200 535 2,000 600 (iv) -877 -200 545 2,000 600 (2) For blades P/Ns FK30838, FK30840, and FK30842, that have been relubricated at intervals not exceeding 600 CSN or 600 CSR using either RR ASB No. RB.211-72-AD344 or SB No. RB.211-72-D347, inspect as specified in paragraph (f) of this AD and within the compliance times specified in the following Table 2: Table 2.—Compliance Times for Blades P/Ns FK30838, FK30840, and FK30842 Engine series Boeing 777 series Airplane maximum gross weight (times 1,000 pounds) Initial inspection CSN Repetitive inspection CSLI (i) -884B, 892 -300 (A) 660 and 632.5 600 80     (B) 580 2,400 600 (ii) -884, -892, -892B, and -895 -200 (A) 632.5 and 648 1,200 100     (B) 656 600 80     (C) 555 2,400 600 (iii) -875 -200 535 2,400 600 (iv) -877 -200 545 2,400 600 (3) For blades P/Ns FW12960, FW12961, FW12962, and FW13175, either new or reworked to that configuration at greater than 600 CSN or since previous rework, or that have not been relubricated during any interval exceeding 600 CSN or 600 CSR using either RR ASB No. RB.211-72-AD344 or SB No. RB.211-72-D347 requirements, inspect as specified in paragraph (f) of this AD and within the compliance times specified in the following Table 3.—Compliance Times for Blades P/Ns FW12960, FW12961, FW12962, and FW13175 Engine series Boeing 777 series Airplane maximum gross weight (times 1,000 pounds) Initial inspection CSN Repetitive inspection CSLI (i) -884B, -892 -300 (A) 660 and 632.5 600 100   (B) 580 2,000 600 (ii) -884B, -892, -892B, and -895 -200 (A) 632.5 and 648 1,200 125     (B) 656 600 100     (C) 555 2,000 600 (iii) -875 -200 535 2,000 600 (iii) -877 -200 545 2,000 600 (4) For blades P/Ns FW12960, FW12961, FW12962, and FW13175, either new or reworked to that configuration at fewer than 600 CSN or since previous rework, and that have been relubricated at intervals not exceeding 600 CSN using either RR ASB No. RB.211-72-AD344 or SB No. RB.211-72-D347, inspect as specified in paragraph (f) of this AD and within the compliance times specified in the following Table 4: Table 4.—Compliance Times for Blades P/Ns FW12960, FW12961, FW12962, and FW13175 Engine series Boeing 777 series Airplane maximum gross weight (times 1,000 pounds) Initial inspection CSN Repetitive inspection CSLI (i) -884B,-892 -300 (A) 660 and 632.5 600 100   (B) 580 2,400 1,200 (ii) -884,-892,-892B, and-895 -200 (A) 632.5 and 648 2,400 125   (B) 656 600 100   (C) 555 2,400 1,200 (iii) -875 -200 535 2,400 1,200 (iv) -877 -200 545 2,400 600 (g) When engines containing blades P/Ns FK30838, FK30840, FK30842, FW12960, FW12961, FW12962, and FW13175 are moved from one gross weight category to another, the inspection schedule that is applicable to the higher gross weight category must be used. Terminating Action (h) As terminating action to the repetitive inspection requirements of this AD, at the next shop visit when the LPC fan blades are removed for repair or overhaul, but no later than December 31, 2009: (1) Replace LPC fan blades P/Ns FK30838, FK30840, FK30842, FW12960, FW12961, FW12962, or FW13175, with serviceable LPC fan blades. (2) For the purposes of this AD, serviceable LPC fan blades are blades that feature additional blade root processing requirements found in RR SB No. RB.211-72-D672, dated February 1, 2002; or are LPC fan blades that feature a full form root profile. Information on full form root profile blades can be found in RR SB No. RB.211-72-D390, RR SB No. RB.211-72-E044, and RR SB No. RB.211-72-E382. Previous Credit (i) Previous credit is allowed for initial inspections of fan blades that were done using RR ASB No. RB.211-72-AD344, Revision 4, dated March 15, 2002, Revision 5, dated June 20, 2003, Revision 6, dated February 27, 2004, or Revision 7, dated March 12, 2004, before the effective date of this AD. Alternative Methods of Compliance (j) 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. Material Incorporated by Reference (k) You must use the Rolls-Royce plc service information specified in Table 5 of this AD to perform the blade inspections and replacements required by this AD. The Director of the Federal Register approved the incorporation by reference of the documents listed in Table 5 of this AD as of January 28, 2005 (70 FR 2336, January 13, 2005). You can get a copy from Rolls-Royce plc, P.O. Box 31, Derby DE24 6BJ, UK; telephone 44 (0) 1332 242424; fax 44 (0) 1332 249936. You may review copies at the FAA, New England Region, Office of the Regional Counsel, Attention: Rules Docket No. 2001-NE-17-AD, 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/code_of_federal_regulations/ibr_locations.html . Table 5 follows: Table 5.—Incorporation by Reference Service Bulletin No. Page Revision Date RB.211-72-AD344 All 7 March 12, 2004. Total Pages: 11 RB.211-72-AD344, Appendices 1 through 5 All 7 March 12, 2004. Total Pages: 18 RB.211-72-D672 All Original February 1, 2002. Total Pages: 24 Related Information (l) Civil Aviation Authority (CAA) airworthiness directive G-2004-0008, dated April 29, 2004, also addresses the subject of this AD. Issued in Burlington, Massachusetts, on September 6, 2005. Peter A. White, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 05-17976 Filed 9-9-05; 8:45 am] BILLING CODE 4910-13-P