2006-05-04: Fan disks

2006-05-04 General Electric Company: Amendment 39-14501. Docket No. 2000-NE-42-AD. Effective Date (a) This AD becomes effective April 7, 2006. Affected ADs (b) This AD supersedes AD 2001-10-03. Applicability (c) This AD applies to General Electric Company (GE) CF34-1A, - 3A, -3A1, -3A2, -3B, and -3B1 turbofan engines. These engines are installed on, but not limited to, Bombardier, Inc. Canadair airplane models CL-600-2A12, -2B16, and -2B19. Unsafe Condition (d) This AD results from an error in the first part number (P/N) and serial number (SN) listed in Table 1 of the original AD. We are issuing this AD to prevent rupture of the fan disk due to cracks that initiate at an electrical arc-out, which could result in an uncontained failure of the engine. (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. Removal of Certain Fan Disks From Service (f) On disk P/Ns 5921T18G01, 5921T18G09, 5921T18G10, 5921T54G01, 5922T01G02, 5922T01G04, 5922T01G05, 6020T62G04, 6020T62G05, 6078T00G01, 6078T57G01, 6078T57G02, 6078T57G03, 6078T57G04, 6078T57G05, and 6078T57G06, that are listed by P/N and SN in the following Table 1 of this AD and that have fewer than 8,000 cycles- since-new (CSN) on the effective date of this AD, replace fan disk P/Ns before accumulating 8,000 CSN: Table 1.--Fan Disks That Require Removal Based on Blended Callouts Disk part No. Disk serial No. 6078T57G02 GAT6306N 6078T00G01 GAT3860G 6078T57G02 GAT1924L 5922T01G04 GAT9599G 6078T57G04 GEE05831 6078T57G04 GEE06612 6078T57G04 GEE06618 6078T57G04 GEE06974 6078T57G04 GEE06980 6078T57G05 GEE143FY 6078T57G05 GEE1453G 6078T57G05 GEE14452 6078T57G05 GEE145NA 6078T57G04 GEE08086 6078T57G04 GEE09287 6078T57G04 GEE09337 6078T57G05 GEE12720 6078T57G05 GEE14214 6078T57G05 GEE142YT 6078T57G05 GEE146GT (g) For disks with SNs listed in Table 1 of this AD that have 8,000 CSN or more on the effective date of this AD, replace the disk within 30 days after the effective date of this AD. Inspection of All Other Fan Disks (h) Inspect all other fan disks, P/Ns 5921T18G01, 5921T18G09, 5921T18G10, 5921T54G01, 5922T01G02, 5922T01G04, 5922T01G05, 6020T62G04, 6020T62G05, 6078T00G01, 6078T57G01, 6078T57G02, 6078T57G03, 6078T57G04, 6078T57G05, and 6078T57G06 in accordance with paragraphs 3.A.(1) through 3.E.(2) of the Accomplishment Instructions of GE Alert Service Bulletin (ASB) CF34-BJ 72-A0088, Revision 1, dated October 30, 2000 or paragraphs 3.A.(1) through 3.A.(2)(f) of the Accomplishment Instructions of GE ASB CF34-AL 72- A0103, dated August 4, 2000. Use the compliance times specified in the following Table 2: Table 2.--Fan Disk Inspection Compliance Times Fan disk operating CSN Inspect (1) Fewer than 8,000 CSN on effective date of this AD Before accumulating 8,000 CSN or by the next hot section inspection after the effective date of this AD, whichever the occurs earlier. (2) 8,000 CSN or more on the effective date of this AD Within 120 days after the effective date of this AD. Definitions (i) For the purposes of this AD, the following definitions apply: (1) A serviceable fan disk is defined as a fan disk that has been inspected as specified in paragraph (h) of this AD and is not listed in Table 1 of this AD. (2) Cycles-since-new for fan disk P/N 5922T01G04 or 5922T01G05 is defined as total cycles accrued since new as P/N 6078T57G02 or 6078T57G03, added to total cycles accrued after modification from P/ N 6078T57G02 or 6078T57G03. 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. Related Information (k) None. Material Incorporated by Reference (l) You must use the General Electric Alert Service Bulletins listed in Table 3 of this AD to perform the inspections required by this AD. The Director of the Federal Register previously approved the incorporation by reference of the documents listed in Table 3 of this AD as of May 31, 2001 (66 FR 27017, May 16, 2001) in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. You can get a copy from GE Aircraft Engines, 1000 Western Avenue, Lynn, MA 01910; Attention: CF34 Product Support Engineering, Mail Zone: 34017; telephone (781) 594-6323; fax (781) 594-0600. You can review copies at the FAA, New England Region, Office of the Regional Counsel, 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 . Table 3.--Incorporation by Reference Alert Service Bulletin No. Page No. Revision Date CF34 BJ 72 A0088 Total Pages: 15 All 1 October 30, 2000. CF34 AL 72 A0103 Total Pages: 78 All Original August 4, 2000.