AD 83-14-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-34-200 | Airworthiness Directives; Piper Model PA-34-200 Airplanes |
Unsafe Condition
Blockage of the muffler exit by a failed heat exchanger cone shaped baffle, which could cause possible power loss or engine stoppage.
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Required Actions
Remove right and left engine cowling, disconnect tailpipe assembly, drill a 0.50 inch diameter hole in the cone shaped deflector, and boroscope the heat exchanger for cracks or buckles. Replace the heat exchanger/tailpipe assembly if cracks or buckles are found.
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Compliance Time
Within the next 50 hours time-in-service after the effective date of this AD or prior to the accumulation of 1050 hours time-in-service on the heat exchanger/tailpipe assemblies, whichever occurs later, and thereafter at intervals not exceeding 100 hours time-in-service.
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Affected Aircraft
Piper Model PA-34-200 airplanes with serial numbers 34-7350343 through 34-7450220, and serial numbers 34-7250001 through 34-7350342 that have exhaust systems installed per Piper Service Letter No. 673 and Kit 760-764V.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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