AD Amdt-39-9926
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | AlliedSignal | Inc. TFE731 Series Turbofan | Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines |
Unsafe Condition
Fatigue cracking and subsequent uncontained failure of the first stage low pressure turbine (LPT) seal plate due to machined geometry not meeting design intent from drawing ambiguity.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service certain first stage LPT seal plates prior to accumulating the new reduced cyclic life limit. Replace with serviceable LPT seal plates.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
AlliedSignal Inc. TFE731 series turbofan engines with first stage LPT seal plates affected by the drawing ambiguity.
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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