AD 86-10-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Canada Corp. | PT6A-42 | PRATT & WHITNEY CANADA Model PT6A-42 Engines |
Unsafe Condition
First stage compressor hub failure, and possible engine failure due to Part Number 3030356 first stage compressor hub on PT6A-42 engines with serial numbers 93001 thru 93804 inclusive at or before 5,000 total cycles.
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Required Actions
Remove from service Part Number 3030356 first stage compressor hub on PT6A-42 engines with serial numbers 93001 thru 93804 inclusive at or before 5,000 total cycles in accordance with PWC Service Bulletin 3002, Revision 12, or FAA approved equivalent.
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Compliance Time
at or before 5,000 total cycles
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Affected Aircraft
Pratt & Whitney Canada PT6A-42 engines with serial numbers 93001 thru 93804 inclusive
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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