AD 97-07-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | T53-L-703 | Airworthiness Directives; AlliedSignal Inc. T5311, T5313, T5317, and T53 (Military) Series Engines |
| engine | Honeywell International Inc. | T5311A | Airworthiness Directives; AlliedSignal Inc. T5311, T5313, T5317, and T53 (Military) Series Engines |
| engine | Honeywell International Inc. | T5311B | Airworthiness Directives; AlliedSignal Inc. T5311, T5313, T5317, and T53 (Military) Series Engines |
| engine | Honeywell International Inc. | T5313B | Airworthiness Directives; AlliedSignal Inc. T5311, T5313, T5317, and T53 (Military) Series Engines |
| engine | Honeywell International Inc. | T5317A | Airworthiness Directives; AlliedSignal Inc. T5311, T5313, T5317, and T53 (Military) Series Engines |
| engine | Honeywell International Inc. | T5317A-1 | Airworthiness Directives; AlliedSignal Inc. T5311, T5313, T5317, and T53 (Military) Series Engines |
| engine | Honeywell International Inc. | T5317B | Airworthiness Directives; AlliedSignal Inc. T5311, T5313, T5317, and T53 (Military) Series Engines |
Unsafe Condition
N2 spur gear nut retainer (lock cup) separation could cause N2 accessory drive assembly disengagement, resulting in uncommanded engine acceleration.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove and replace N2 spur gear nut retainers with Part Numbers 1-070-066-02 or 1-070-066-03, following specified AlliedSignal Aerospace Service Bulletins within 300 hours time in service or 2 years after the AD's effective date, whichever comes first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 300 hours time in service, or 2 years after the effective date of this AD, whichever occurs first
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Affected Aircraft
AlliedSignal Inc. (formerly Textron Lycoming) T5311, T5313, T5317, and T53 (military) series engines installed on Bell Helicopter Textron 209, 205, 204, Kaman K-1200, Bell AH-1, UH-1, and Grumman OV-1 aircraft certified under Section 21.25 or 21.27 of the FAR.
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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