Airworthiness Directive · Amendment 39-13488 · General Electric Company (GE) CF6-80 Series Turbofan Engines
General Electric Company (GE) CF6-80 Series Turbofan Engines
Superseded. A later AD replaced this one: AD 2006-16-06. Comply with the one in force.
This AD applies to the General Electric Company (GE) CF6-80 turbofan engine models listed in the following Table 1: Table 1.--Applicability Models, Part Numbers, Airplanes Stage 1 high pressure turbine Engines installed on Models (HPT) rotor disk but not limited to part Nos. (PNs) CF6-80A, CF6-80A1, CF6-80A2, 9234M67G22/G24/G25/ Airbus A310 and CF6-80A3. G26. 9362M58G02/G06/ Boeing 767 G07/G09. 9367M45G02/ airplanes. G04/G09. CF6-80C2A1, CF6-80C2A2, CF6- 1862M23G01. Airbus A300, A310, 80C2A3, CF6-80C2A5, CF6- 9392M23G10/G12/G21. Boeing 747, 767, 80C2A8, CF6-80C2A5F, CF6- 1531M84G02/G06/G08/ and McDonnell 80C2B1, CF6-80C2B2, CF6- G10. Douglas MD11 80C2B4, CF6-80C2B6, CF6- airplanes. 80C2B1F, CF6-80C2B2F, CF6- 80C2B4F, CF6-80C2B5F, CF6- 80C2B6F, CF6-80C2B6FA, CF6- 80C2B7F, CF6-80C2D1F. CF6-80E1A2, CF6-80E1A4...... 1639M41P04.......... Airbus A330 airplanes. These engines are installed on, but not limited to, the airplanes listed in Table 1 of this AD.
The FAA is superseding two existing airworthiness directives (ADs) for GE CF6-80 series turbofan engines with certain stage 1 high- pressure turbine (HPT) rotor disks. Those ADs currently require initial and repetitive inspections of certain stage 1 HPT rotor disks for cracks in the bottom of the dovetail slot. This action retains the initial inspection requirement, as a qualification for the mandatory rework procedures for certain disks, and continues repetitive inspections only for the disks for which the rework procedures are not yet defined. This action requires reworking certain disks before further flight. In addition, this AD expands the population of affected engines and removes certain CF6-80E1 series disks from service. This AD results from the manufacturer's investigation and development of a rework procedure that chamfers the aft breakedge of the dovetail slot bottom. We are issuing this AD to detect and prevent cracks in the bottoms of the dovetail slots that could propagate to failure of the disk and cause an uncontained engine failure.
