- Effective
- March 5, 1976
- Published
- March 4, 1976
- Issued
- February 20, 1976
- Models
- PA-31, PA-31-300, PA-31-325, PA-31-350, PA-31P, PA-31T
- Registered aircraft
- 692 matched by model
- Product
- Aircraft · Small airplane
- Amendment
- 39-2532
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed November 21, 2025.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 21 KB | 800b48ad…610d2f6 | FAA DRS (API key needed) |
On this page
The airworthiness directive
76-04-11 PIPER: Amendment 39-2532. Applies to Models PA-31, PA-31-300, and PA- 31-325, Serial Numbers 31-2 through 31-7612009; Model PA-31-350, Serial Numbers 31-5001 through 31-7612018; Model PA-31P, Serial Numbers 31P-1 through 31P-7630001 and 31P-7630003; Model PA-31T, Serial Numbers 31T-7400002 through 31T-7620002, 31T-7620004, 31T-7620005 and 31T-7620007, certificated in all categories.
To prevent possible hazards in flight associated with loose bolts which attach the control shaft collar to the control shaft tube, accomplish the following within the next fifty hours in service from the effective date of this AD unless previously accomplished.
(a) Alter the attachment of the control shaft collar to the control shaft tube in accordance with Piper Service Letter No. 643 and the directions contained in paragraphs one through eight of the "Instructions" section of Piper Service Bulletin No. 487 or approved equivalent alteration.
Equivalent alterations must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.
This amendment is effective March 5, 1976.
Affected TCDS · 2
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 692
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1968 | 6 |
|---|---|
| 1969 | 1 |
| 1970 | 6 |
| 1971 | 2 |
| 1972 | 2 |
| 1973 | 24 |
| 1974 | 24 |
| 1975 | 33 |
| 1976 | 52 |
| 1977 | 56 |
| 1978 | 71 |
| 1979 | 76 |
| 1980 | 77 |
| 1981 | 62 |
| 1982 | 21 |
| 1983 | 14 |
| 1984 | 13 |
| 1996 | 1 |
151 with no year recorded