Airworthiness Directive · Amendment 39-15695 · General Electric Company CF6-80C2 Series and CF6-80E1 Series Turbofan Engines
General Electric Company CF6-80C2 Series and CF6-80E1 Series Turbofan Engines
This AD applies to the General Electric Company (GE) CF6-80C2 and CF6-80E1 engines specified in the following Table 1 of this AD. These engines are installed on, but not limited to, Airbus A300, A310, and A330 series airplanes, Boeing 747 and 767 series airplanes, and McDonnell Douglas MD11 series airplanes.
| Engine model | With Low-Pressure Turbine (LPT) Case Part No. (P/N) Installed |
|---|---|
| CF6-80C2A1, -80C2A2, -80C2A3, -80C2A5, -80C2A5F, -80C2A8, -80C2B1, -80C2B1F, -80C2B1F1, -80C2B1F2, -80C2B2, -80C2B2F, -80C2B3F, -80C2B4, -80C2B4F, -80C2B5F, -80C2B6, -80C2B6F, -80C2B6FA, -80C2B7F, -80C2B8F, -80C2D1F, and -80C2L1F | 1336M99G01, 1336M99G02, 1336M99G03, 1336M99G04, 1336M99G06, 1336M99G07, 1336M99G08, 1336M99G09, 1336M99G10, 1336M99G12, 1336M99G13, or 1336M99G15. 1647M68G05, 1647M68G08, 1647M68G09, or 1647M68G15. 1713M73G01, 1713M73G02, or 1713M73G05. 9367M99G11or 9367M99G17. |
| CF6-80E1A1, -80E1A2, -80E1A3, -80E1A4, -80E1A4/B | 1647M68G02, 1647M68G04, 1647M68G07, 1647M68G12, or 1647M68G13. |
The FAA is adopting a new airworthiness directive (AD) for General Electric Company (GE) CF6-80C2 series and CF6-80E1 series turbofan engines. This AD requires installing skin doubler pads and deflectors on stage 5 of certain low-pressure turbine (LPT) cases, or replacing those LPT cases with LPT cases that have skin doubler pads and deflectors already installed. This AD results from four events in which hardware fragments were liberated into the engine flowpath and wore through LPT cases on CF6-80C2 and CF6-80E1 series engines. We are issuing this AD to prevent an uncontained release of engine debris and loss of the structural integrity of the mount system that supports the engine. Loss of the mount system structural integrity could result in the engine separating from the airplane.
You are responsible for having the actions required by this AD performed the next time the LPT module is completely disassembled to piece-part level, but not to exceed 8 years after the effective date of this AD, unless the actions have already been done.
For CF6-80C2 engines specified in Table 1 of this AD that have an LPT case with a P/N specified in Table 1 of this AD, do either of the following:
(1) Rework the LPT case to install skin doubler pads and deflectors. Use the Accomplishment Instructions of GE Service Bulletin (SB) No. CF6-80C2 S/B 72-1171, Revision 1, dated February 1, 2006, and Repair Document (RD) No. 935-314-S4, dated January 28, 2008, to rework the LPT case, or
(2) Install an LPT case that has skin doubler pads and deflectors.
For CF6-80E1 engines specified in Table 1 of this AD that have an LPT case with a P/N specified in Table 1 of this AD, do either of the following:
(1) Rework the LPT case to install skin doubler pads and deflectors. Use the Accomplishment Instructions of SB No. CF6-80E1 S/B 72-0303, Revision 1, dated February 1, 2006, and RD No. 935-314-S4, dated January 28, 2008, to rework the LPT case, or
(2) Install an LPT case that has skin doubler pads and deflectors.
If you previously performed the actions specified in paragraphs (f) through (g)(2) of this AD, using the rework procedures in the following service documents before the effective date of this AD, you have satisfied the compliance requirements of this AD:
(1) GE SB No. CF6-80C2 S/B 72-1171, dated May 25, 2005 and RD No. 935-314-S2, dated January 4, 2006, or RD No. 935-314-S3, dated August 10, 2006.
(2) GE SB No. CF6-80E1 S/B 72-0303, dated June 1, 2005 and RD No. 935-314-S2, dated January 4, 2006, or RD No. 935-314-S3, dated August 10, 2006.
(i) LPT case skin doubler pads and deflectors are distinct and separate parts. For identification purposes, a deflector pad is a square-shaped plate with no threaded stud on it, and a deflector has a threaded stud on it.
