AD 96-04-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | TFE731-2 | Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines |
| engine | Honeywell International Inc. | TFE731-2A | Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines |
| engine | Honeywell International Inc. | TFE731-2B | Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines |
| engine | Honeywell International Inc. | TFE731-2BR | Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines |
| engine | Honeywell International Inc. | TFE731-2C | Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines |
| engine | Honeywell International Inc. | TFE731-3 | Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines |
| engine | Honeywell International Inc. | TFE731-3A | Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines |
| engine | Honeywell International Inc. | TFE731-3AR | Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines |
| engine | Honeywell International Inc. | TFE731-3B | Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines |
| engine | Honeywell International Inc. | TFE731-3BR | Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines |
Unsafe Condition
Fatigue cracking in the dovetail slots of fan rotor disks due to undetected cracks during eddy current inspections, which can result in uncontained failure, 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
Reinspect 33 additional fan rotor disks beyond those required by AD 93-25-16 using improved eddy current inspection procedures per AlliedSignal Alert Service Bulletin TFE731-A72-3578. Replace cracked disks with serviceable parts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required as indicated, unless accomplished previously.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
AlliedSignal Inc. TFE731-2, -2A, -3, -3R series turbofan engines with fan rotor disks part numbers 3072162-1 through -4, 3073436-1 through -4, 3073539-2, and 3074529-2 installed on specified aircraft models.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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