- Published
- June 17, 1950
- Issued
- June 17, 1950
- Models
- PA-12, PA-12S, J3C-65S, J3C-65 (Army L-4; L-4A; L-4B (Navy NE-1); L-4H; L-4J (Navy NE-2))
- Registered aircraft
- 1,274 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 April 3, 2026.
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 | 8d920f71…0041506 | FAA DRS (API key needed) |
On this page
The airworthiness directive
46-37-01 PIPER: (Was Mandatory Note 12 of AD-691-02 and Mandatory Note 1 of AD- 780-3.) Applies to J3C-65 and J3C-65S, Serial Numbers 14027 and Up and All PA-12.
Compliance required by November 1, 1946.
To prevent possible failure of the fuel strainer bowl, replace the present thin fuel strainer bowl gasket with a 1/8-inch thick cork and neoprene gasket supplied by Piper. The bowl seat nut should be tightened only finger tight. The bowl should be carefully examined for signs of flaws or cracks and should be replaced if any are found.
(Piper Service Bulletin No. 89 dated July 11, 1946, covers this same subject.)
Affected TCDS · 2
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 1,274
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1940 | 3 |
|---|---|
| 1941 | 2 |
| 1942 | 1 |
| 1945 | 2 |
| 1946 | 431 |
| 1947 | 571 |
| 1948 | 2 |
| 1949 | 1 |
| 1952 | 1 |
| 1954 | 2 |
| 1955 | 3 |
| 1956 | 3 |
| 1957 | 1 |
| 1962 | 1 |
250 with no year recorded