AD 79-12-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-24-400 | Airworthiness Directives; Piper PA-24-400 Series, PA-30, and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-30 | Airworthiness Directives; Piper PA-24-400 Series, PA-30, and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-39 | Airworthiness Directives; Piper PA-24-400 Series, PA-30, and PA-39 Aircraft |
Unsafe Condition
Fuel mismanagement from inter-port leakage with the fuel selector valve causing fuel to transfer from one tank to another.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Accomplish checks in accordance with Piper Service Letter No. 851, Part A or an approved equivalent. Item 3 is to be repeated only twice. If drainage exceeds one half (1/2) fluid ounce of fuel, comply with Item 5. For PA-30 and PA-39 aircraft exposed to below freezing temperatures, perform checks prior to the first flight of the day and after each refueling operation as per Service Letter 851, Part B. For PA-24-400 aircraft similarly exposed, perform checks per Service Letter 851, Part C.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 hours of operation after the effective date of this AD and at each 50 hours of operation thereafter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper PA-24-400 S/N 26-2 through 26-148; PA-30 S/N 30-2 through 30-2000; PA-39 S/N 39-1 through 39-155.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.