AD 93-23-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31 | Airworthiness Directive; PIPER AIRCRAFT CORPORATION Model PA-31, PA-31-300, PA-31-325 and PA-31-350 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-300 | Airworthiness Directive; PIPER AIRCRAFT CORPORATION Model PA-31, PA-31-300, PA-31-325 and PA-31-350 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-325 | Airworthiness Directive; PIPER AIRCRAFT CORPORATION Model PA-31, PA-31-300, PA-31-325 and PA-31-350 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-350 | Airworthiness Directive; PIPER AIRCRAFT CORPORATION Model PA-31, PA-31-300, PA-31-325 and PA-31-350 Airplanes |
Unsafe Condition
Improper sealing of the baffle seals to the engine cowling could result in high engine operating temperatures.
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Required Actions
Visually inspect engine baffle seals for proper positioning using a light. If improperly positioned, install thicker baffle seals per Piper Kit 764 093 or Brown Aircraft Supply materials. Properly positioned seals require reinspection every 50 hours time-in-service.
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Compliance Time
Initially within the next 50 hours time-in-service after the effective date (January 21, 1994), and thereafter as indicated.
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Affected Aircraft
Piper Aircraft Corporation Model PA-31, PA-31-300, PA-31-325 (serial numbers 31-2 through 31-8012089), and PA-31-350 (serial numbers 31-5001 through 31-8052199).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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