| AD Number | 81-01-01 | Status | Active |
| Effective Date | February 27, 1981 | Issue Date | February 13, 1981 |
| Docket Number | Unknown | Amendment | 39-4051 |
| 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 |
81-01-01 PIPER: Amendment 39-4051. Applies to Piper PA-31T S/N 8120008, 8120009, 8120010, and 8120013, and Piper PA-31T1 airplanes S/N 8104007, 8104008, 8104009, 8104010, 8104011, 8104012, and 8104013. Compliance required as indicated, unless already accomplished.
To prevent loss of the propeller and intake lip deicing functions, comply as follows:
Prior to further flight in known icing conditions, inspect for proper propeller and intake lip deice power relay in accordance with Piper telegraphic form letter #31-28, dated December 22, 1980, or equivalent, approved by Chief, Engineering and Manufacturing Branch. If (P/N 484247) relay is installed, check to insure that correct D.C. relay PRD7DYD (24 VDC) is installed. If the latter relay is not installed, remove and install proper relay prior to further flight in known icing conditions.
This amendment is effective February 27, 1981, and was effective upon receipt by all recipients of the letter dated December 24, 1980.