| AD Number | 80-25-05 | Status | Active |
| Effective Date | February 12, 1981 | Issue Date | January 29, 1981 |
| Docket Number | Unknown | Amendment | 39-4041 |
| Product Type | ["Aircraft"] | Product Subtype | ["Small Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | --- - _EMPTY_ |
| Citation | This information is not available. | ||
| Manufacturer(s) | Piper Aircraft Inc. |
| Model(s) | PA-31T PA-31T1 |
80-25-05 PIPER: Amendment 39-4041. Applies to Piper PA-31T S/N 8120001 thru 8120010 and Piper PA-31T1 airplanes S/N 8104001 thru 8104012.
Compliance required as indicated:
To prevent failure of the voltage regulator which can result in complete electrical failure, prior to further flight either at night or into instrument weather conditions, 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.
This amendment is effective February 12, 1981, and was effective upon receipt for all recipients of the letter of November 26, 1980, covering this same subject.