- Models
- 6A4-150-B3, 6A4-150-B31
- Data sheet
- TCDSE-238
- Registered aircraft
- 623 matched by model
- Product
- Engine
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 | 44bb67ae…b2b8038 | FAA DRS (API key needed) |
On this page
The airworthiness directive
48-21-01 BELLANCA: Applies to All Aircraft Equipped With Franklin Model 6A4-150- B3 and B31 Engines.
Compliance required after each 25 hours of operation.
To prevent possible binding of accelerator pump linkage in Marvel-Schebler MA-3-SPA carburetor, check for worn accelerator pump linkage. Worn parts should be replaced. Marvel- Schebler have a kit (Part A666-581) available for this purpose.
(Franklin Service Bulletin No. 61 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 · 623
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1939 | 1 |
|---|---|
| 1940 | 1 |
| 1941 | 3 |
| 1943 | 2 |
| 1945 | 2 |
| 1946 | 302 |
| 1947 | 181 |
| 1948 | 3 |
| 1949 | 4 |
| 1950 | 1 |
| 1958 | 1 |
| 1970 | 1 |
| 1997 | 1 |
120 with no year recorded