- Models
- C-46A, C-46D, C-46F, C-46R, C-46E, C-46A and 9 more
- Registered aircraft
- 7 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 | 21 KB | 04f00218…e0e65db | FAA DRS (API key needed) |
On this page
The airworthiness directive
47-51-04 CURTISS-WRIGHT Applies to All C-46 Series Airplanes Incorporating Hamilton Standard Propellers.
Compliance required by March 1, 1948.
To eliminate failure of the propeller flexible feathering line, an antiheat shield shall be installed in accordance with the following instructions:
(a) Remove the engine cowling adjacent to the propeller feathering line and inspect the flexible propeller feathering hose and lagging material (if installed) for disintegration and deterioration. Replace hose if deterioration is evident.
(b) Fabricate the antiheat shield and attaching clamps as shown in Figure 1.
(c) Place antiheat shield over the flexible hose and mount the shield on the engine mount by use of the clamps shown in Figure 1. The shield should be centered over the flexible hose. It may be necessary to rebend the metal feathering line slightly to achieve proper centering.
(d) Upon completion of installation, check operation of propeller feathering system.
(The above information is also contained in Army Air Forces Technical Order 01-25L- 105 dated April 2, 1947. Copies of this Technical Order are not available for distribution by the FAA.)
Affected TCDS · 2
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 7
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1942 | 1 |
|---|---|
| 1944 | 4 |
| 1945 | 1 |
| 1959 | 1 |