AD Amdt-39-9529
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | AlliedSignal | Inc. TFE731 Series Turbofan | Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines |
Unsafe Condition
Fatigue cracking in the fan rotor disk dovetail slots due to higher than initially calculated stress levels, which can result in uncontained failure of fan rotor disks, inflight engine shutdowns, severe secondary damage, and fan rotor assembly separation from the engine.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct initial and repetitive eddy current inspections using an improved procedure for detecting fan rotor disk dovetail slot cracks. Disallow fluorescent penetrant inspection (FPI) as an alternative method. Add additional engine models and fan rotor disk part numbers to the inspection requirements.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
AlliedSignal Inc. (formerly Garrett Engine Division) TFE731 Series Turbofan Engines, including additional engine models and fan rotor disk part numbers specified in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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