- Models
- PA-12, PA-12S
- Data sheet
- TCDSA-780
- Registered aircraft
- 1,247 matched by model
- Product
- Aircraft · Small airplane
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 May 30, 2024.
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 | 19 KB | 73f9d257…e8f2d6b | FAA DRS (API key needed) |
On this page
The airworthiness directive
51-21-02 PIPER: Applies to All Model PA-12 Airplanes.
Compliance required not later than October 15, 1951, and each 100 hours of operation thereafter unless reinforcements are installed.
Carefully inspect aileron hinge brackets to false spar attachment fittings, P/N N10931, (3 per wing), for cracks at the bend between the channel and flat portions of the fittings. If cracked fittings are found, add reinforcement bracket P/N 12047. With reinforcement brackets P/N 12047 installed, special inspections may be discontinued.
(Piper Service Bulletin No. 107, dated September 24, 1948, covers this same subject.)
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 1,247
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1945 | 1 |
|---|---|
| 1946 | 417 |
| 1947 | 571 |
| 1948 | 2 |
| 1949 | 1 |
| 1952 | 1 |
| 1954 | 2 |
| 1955 | 3 |
| 1956 | 3 |
| 1957 | 1 |
| 1962 | 1 |
244 with no year recorded