Airworthiness Directive · Amendment 39-14056 · General Electric Company (GE) CF6-45 and CF6-50 Series Turbofan Engines
General Electric Company (GE) CF6-45 and CF6-50 Series Turbofan Engines
This AD applies to General Electric Company (GE) CF6-45 and CF6-50 series turbofan engines. These engines are installed on, but not limited to, Boeing DC-10, 747 series, and Airbus Industrie A300 series airplanes.
The FAA is adopting a new airworthiness directive (AD) for GE CF6-45 and CF6-50 series turbofan engines. This AD requires reviewing accumulated cyclic-life records of 10 life-limited rotating parts, correcting those records, and removing from service parts that exceed the low-cycle-fatigue (LCF) life limits published in the Engine Manual Chapter 5, Airworthiness Limitations Section (ALS). This AD results from an error in a tracking database that subtracted flight cycles of certain serial number (SN) parts from the actual accumulated cycles. We are issuing this AD to prevent rotating parts that may have exceeded their LCF life limit from failing, leading to uncontained engine failure.
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done.
Within 10 days after the effective date of this AD, do the following:
(1) Check the engine records for the part numbers (P/Ns) and SNs listed in Table 1 of this AD.
(2) Make the required cycle and hour corrections for those parts.
| P/N | SN | Part name | Required cycle correction | Required hour correction |
|---|---|---|---|---|
| 9051M71P17 | MPOA0748 | Disk, Fan Stage 1 | +2,429 | +15,936 |
| 9079M63P17 | MPOC7054 | Shaft, Compressor Rotor Rear | +2,429 | +15,936 |
| 9234M35P01 | MPOU3470 | Shaft, Forward High Pressure Turbine (HPT) Rotor | +2,429 | +15,936 |
| 9128M81G03 | APV01489 | Shaft, HPT Rotor Rear | +2,429 | +15,936 |
| 9080M27P04 | MPOA0853 | Shaft, Fan Forward | +2,429 | +15,936 |
| (9080M28G10) | (Shaft, Fan Forward-Balanced) | |||
| 9061M21P03 | SNE01254 | Disk, Low Pressure Turbine (LPT) Rotor Stage 1 | +1,224 | +5,708 |
| 9061M70G01 | KLA00801 | Tube, LPT Air | +2,429 | +15,936 |
| 9185M75G01 | MPOH4228 | Spool, Fan Rotor Stage 2-4 | +2,429 | +15,936 |
| 9045M86P10 | CAN01080 | Adapter, Tube | +2,429 | +15,936 |
| 9061M26P20 | PMOA0508 | Shaft, LPT Rear | +2,429 | +15,936 |
(3) After correcting the cycles and hours, remove from service any rotating parts listed in Table 1 of this AD that exceed their LCF life limit, within 100 cycles-in-service after the effective date of this AD.
(g) After the effective date of this AD, do not install any part listed in Table 1 of this AD into any engine, unless the cycles and hours have been corrected as specified in paragraph (f) of this AD.
(h) After the effective date of this AD, do not install any engine unless the records check specified in paragraph (f) of this AD has been performed.
