AD 80-25-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31T | Airworthiness Directives; Piper Model PA-31T and PA-31T1 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31T1 | Airworthiness Directives; Piper Model PA-31T and PA-31T1 Airplanes |
Unsafe Condition
Failure of the voltage regulator can result in complete electrical failure.
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Required Actions
Alter the voltage regulator (Piper P/N 584152) in accordance with Piper telegraphic letter #31-26 dated November 26, 1980, or an approved equivalent. Equivalent alterations must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, Jamaica, New York.
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Compliance Time
prior to further flight either at night or into instrument weather conditions
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Affected Aircraft
Piper Model PA-31T S/N 8120001 thru 8120010 and PA-31T1 airplanes S/N 8104001 thru 8104012
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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