AD 68-05-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Canada Corp. | PT6A-20 | UNITED AIRCRAFT of CANADA, LIMITED Models PT6A-6B and PT6A-20 Engines |
| engine | Pratt & Whitney Canada Corp. | PT6A-6B | UNITED AIRCRAFT of CANADA, LIMITED Models PT6A-6B and PT6A-20 Engines |
Unsafe Condition
Failure of the propeller to reverse or immediate reversing upon selection of reverse mode due to insufficient wall thickness in teleflex reversing control cable terminals P/N's 3010175 and 30101495.
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Required Actions
Install a placard prohibiting propeller reverse use, X-ray or physically inspect terminals for minimum 0.08-inch wall thickness, and replace terminals below minimums with approved parts marked DH.
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Compliance Time
prior to further flight for (a), within the next 25 hours' time in service after February 28, 1968 for (b), (c), and (d) where applicable
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Affected Aircraft
Pratt & Whitney Canada Corp. Models PT6A-6B and PT6A-20 Engines
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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