AD 2022-05-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company | Airworthiness Directives; General Electric Company Turbofan Engines |
Unsafe Condition
Teflon material in the A-sump oil strainer (strainer assembly) screen after several reports of in-flight shutdowns (IFSDs) and unscheduled engine removals (UERs) due to Teflon oil seals disbonding from the aluminum housing when used with either high thermal stability (HTS) or high performance capability (HPC) oils.
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Required Actions
Initial and repetitive visual inspections of the strainer assembly screen. As a terminating action to the initial and repetitive visual inspections, the replacement of the stationary oil seal at the No. 1 forward bearing.
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Compliance Time
Within 50 flight hours
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Affected Aircraft
GE CF34-10E model turbofan engines with a stationary oil seal, P/N B1316-00453 or P/N B1316-01274, installed at the No. 1 forward bearing, that has been repaired, overhauled, or entered into service after August 2014, and used HTS oil or HPC oil for 56 flight hours or more during the life of the stationary oil seal.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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