- Models
- DC3C-R-1830-90C, DC3C-S1C3G, DC3C-S4C4G
- Data sheet
- TCDSA-669
- Registered aircraft
- 45 matched by model
- Product
- Aircraft · Large 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 | 37c7c480…b5dfc47 | FAA DRS (API key needed) |
On this page
The airworthiness directive
47-51-12 DOUGLAS: Applies to All converted C-47 Series Aircraft With Ram Non-ram (Hydraulic) Type Carburetor Airscoop.
To be accomplished not later than March 1, 1948.
Compliance with the following items is necessary to preclude carburetor icing:
1. The carburetor alcohol system must be used.
2. The accessory cowling and engine fire seal must maintain not more than 1/4-inch clearance of the collector ring.
3. The cable system for operation of the hot air door must be rigged to 30 pounds tension.
(Part B of Douglas Service Bulletin DC-3 No. 251 dated April 15, 1947, covers this same subject. Part A of the same Bulletin is not mandatory, but optional compliance may be accomplished when parts are available.)
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 45
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1940 | 1 |
|---|---|
| 1941 | 1 |
| 1942 | 7 |
| 1943 | 7 |
| 1944 | 13 |
| 1945 | 3 |
| 1949 | 1 |
| 1987 | 1 |
11 with no year recorded