AD Amdt-39-10610
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; AlliedSignal Inc. (Formerly Textron Lycoming) Model T5313B, T5317A, and T53 (Military) Turboshaft Engines |
| aircraft | Aviat | Various | Airworthiness Directives; AlliedSignal Inc. (Formerly Textron Lycoming) Model T5313B, T5317A, and T53 (Military) Turboshaft Engines |
Unsafe Condition
Accessory drive carrier assembly failure could result in N2 overspeed and uncontained engine failure.
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Required Actions
Revise the Applicability paragraph by adding military helicopter models and removing one civilian helicopter model. Ensure compliance with existing requirements for one-time visual inspection of accessory drive carrier assemblies for affected serial numbers and replacement if necessary.
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Compliance Time
Before further flight
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Affected Aircraft
AlliedSignal Inc. (formerly Textron Lycoming) Model T5313B, T5317A, and T53 series military turboshaft engines installed on aircraft certified under Section 21.25 of the FAR.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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