AD 78-16-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-32R-300 | Airworthiness Directives; Piper Aircraft Corporation Models PA-32R-300 and PA-32RT-300 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-32RT-300 | Airworthiness Directives; Piper Aircraft Corporation Models PA-32R-300 and PA-32RT-300 Airplanes |
Unsafe Condition
Engine failure due to engine oil loss.
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Required Actions
Replace both engine oil coolers with Piper Oil Cooler replacement kit 763-859V or modify the oil cooler system per Aircraft Metal Products STC SA3736WE. Perform daily pre-flight and post-flight checks for oil deposits in specified areas. Conduct initial and recurring inspections within 10 hours time in service for cracks or leakage in oil coolers. Component replacements must be done by authorized personnel.
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Compliance Time
On or before September 30, 1979, for replacement or modification. Daily checks required until compliance. Initial inspection within 10 hours time in service after effective date, recurring every 10 hours thereafter until compliance.
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Affected Aircraft
Piper Aircraft Corporation Models PA-32R-300 (serial numbers 32R-7680001 through 32R-7880068) and PA-32RT-300 (serial numbers 32R-7885001 through 32R-7885207).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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