AD 92-04-08

92-04-08 GENERAL ELECTRIC COMPANY: Amendment No. 39-8179, Docket No. 91-ANE-58. Applicability: General Electric Company (GE) CF6-80A series turbofan engines installed on, but not limited to, Airbus A310 and Boeing 767 aircraft. Compliance: Required as indicated, unless previously accomplished. To prevent an uncontained engine failure, an inflight engine shutdown, and damage to the aircraft, accomplish the following: (a) Prior to further flight, after the effective date of this AD, remove from service CF6-80A high pressure turbine rotor (HPTR) stage 1 disk/shafts identified by the following part number (P/N) and serial number (S/N):

PART NUMBER SERIAL NUMBER 9362M58 MPOP8483 9362M58 MPOS1676

Prior to returning affected engines to service replace with a serviceable part. (b) Eddy current and fluorescent penetrant inspect, CF6-80A HPTR stage 1 disk/shafts identified by the following P/N and S/N, in accordance with the Accomplishment Instructions of GE CF6-80A Service Bulletin (SB) 72-605, dated December 20, 1991, within the next 400 cycles in service (CIS) after the effective date of this AD, not to exceed 3,400 total CIS since last chrome plating repair procedure:

PART NUMBER SERIAL NUMBER 9234M67 MPOP2707 9234M67 MPON6442 9234M67 MPOP7075 9362M58 MPOS4048

(c) Remove from service CF6-80A HPTR stage 1 disk/shafts which exceed the serviceable limits defined in Paragraphs 2.C.(6) and 2.D. of the Accomplishment Instructions of GE CF6-80A SB 72-605, dated December 20, 1991. (d) Aircraft may be ferried in accordance with the provisions of FAR 21.197 and 21.199 to a base where the AD can be accomplished. (e) Upon submission of substantiating data by an owner or operator through an FAA Inspector (maintenance, avionics, or operations, as appropriate), an alternate method of compliance with the requirements of this AD or adjustments to the compliance times specified in this AD may be approved by the Manager, Engine Certification Office, Engine & Propeller Directorate, Aircraft Certification Service, 12 New England Executive Park, Burlington, Massachusetts 01803-5299. (f) The inspections shall be done in accordance with the following General Electric document:

Document No. Page No. Issue Date GE CF6-80A 1-29 Original Dec. 20, 1991 SB 72-605

Total Pages: 29

This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from General Electric Aircraft Engines, CF6 Distribution Clerk, Room 132, 111 Merchant Street, Cincinnati, Ohio 45246. Copies may be inspected at the FAA, New England Region, Office of the Assistant Chief Counsel, Room 311, 12 New England Executive Park, Burlington, Massachusetts, or at the Office of the Federal Register, 1100 L Street, NW, Room 8401, Washington, DC. (g) This amendment (39-8179, AD 92-04-08) becomes effective on March 27, 1992.