AD Amdt-39-13773
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company CF34-3A1 and -3B1 Series | Airworthiness Directives; General Electric Company CF34-3A1 and -3B1 Series Turbofan Engines |
Unsafe Condition
Stage 5 LPT disks and stage 6 LPT disks may fail due to low-cycle-fatigue (LCF), leading to uncontained engine failure.
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Required Actions
Initial and repetitive visual and eddy current inspections of certain serial number stage 5 LPT disks and stage 6 LPT disks. Optional replacement of suspect disks as terminating action to repetitive inspections. Replacement of certain stage 5 LPT disks and stage 6 LPT disks.
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Compliance Time
Within the compliance times specified in Table 1 of this AD.
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Affected Aircraft
General Electric Company CF34-3A1 and -3B1 series turbofan engines with stage 5 LPT disks, P/N 6078T92P01, and/or stage 6 LPT disks, P/N 6078T89P01, with serial numbers listed in Figure 3 of GE Alert Service Bulletin CF34-AL S/B 72-A0173, Revision 3.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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