AD 67-25-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31 | Airworthiness Directives; Piper Model PA-31 Aircraft |
Unsafe Condition
Oil cooler hoses P/N 41230-09 and P/N 41230-12 may have broken strands of metal braid, stiffness, or discoloration, which could lead to hose failure.
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Required Actions
Inspect oil cooler hoses, remove steel bands, cut fire sleeves, check for defects, replace defective hoses, reinstall fire sleeves with stainless steel safety wire, clean hoses, and ensure proper routing and clamping clearance from exhaust systems. Follow Piper Service Bulletin No. 254 and install replacement kit P/N 757-167.
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Compliance Time
Prior to next flight and every five hours time in service thereafter, until Piper replacement kit P/N 757-167 is installed
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Affected Aircraft
Piper Model PA-31 Aircraft Serial Numbers 31-2 to 31-29 inclusive; 31-31 to 31-38 inclusive; 31-40 to 31-45 inclusive; 31-48, 31-54.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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