AD 75-12-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | T5313A | AVCO LYCOMING Model T5313A and T5313B Engines |
| engine | Honeywell International Inc. | T5313B | AVCO LYCOMING Model T5313A and T5313B Engines |
Unsafe Condition
Failure of the second stage gas producer cylinder retaining bolts, specifically part numbers MS9060-08 and MS9705-08.
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Required Actions
Remove all P/N MS9060-08 and MS9705-08 retaining bolts within 100 hours time in service after the effective date and replace with new P/N 1-110-262-01 bolts per Avco Lycoming Service Bulletin 0028 Rev 2 or later. Equivalent methods may be approved.
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Compliance Time
within the next 100 hours time in service after the effective date of this airworthiness directive
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Affected Aircraft
Avco Lycoming T5313A and T5313B model turboshaft engines
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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