- 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 | 682bf510…9a96386 | FAA DRS (API key needed) |
On this page
The airworthiness directive
54-05-01 CURTISS-WRIGHT: Applies to all C-46 Series aircraft equipped with Landing Gear Retraction Cylinder Heads, Curtiss-Wright P/N S20-313-3044.
Compliance required as soon as practicable but not later than July 15, 1954.
As a result of several failures of the landing gear retraction cylinder head emanating from fatigue cracks occurring in the radius of the O ring groove, it has been found necessary to inspect and rework the landing gear retraction cylinder head to provide a more serviceable part.
Remove the landing gear retraction cylinder head and inspect the upper and lower radii of the O ring groove for cracks by means of a dye penetrant. If cracks are found the part should be replaced. In the event no cracks are present the upper and lower radii of the O ring groove should be increased to 0.040 inch as shown in Figure 4 and again inspected by means of a dye penetrant. If no cracks are found after this inspection, the part may be returned to service; however,if cracks are evident, the part should be replaced.
Note: Smooth machine finish (RMS-32 or better) with no tool marks or discontinuities. No change in size of O ring necessary.
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 |