- Models
- C-46A, C-46D, C-46F
- Data sheet
- TCDSA-789
- Registered aircraft
- 6 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 | ec65992e…cd3b906 | FAA DRS (API key needed) |
On this page
The airworthiness directive
59-07-02 CURTISS-WRIGHT: Applies to all L.B. Smith C46/CW20-T aircraft not having this modification incorporated.
To be accomplished not later than August 1, 1959.
Service experience has indicated that the auxiliary hydraulic pump is unsatisfactory for use in compliance with the minimum gear retraction time.
To provide reliable continuous hydraulic pressure during landing gear retraction, the auxiliary hydraulic pump and motor must be removed from the hydraulic system and replaced by a hydraulic by-pass system in accordance with L. B. Smith Aircraft Corporation Report No. RX5.130.01 dated April 16, 1958, or an equivalent system. Airplane Flight Manual Revision, dated July 11, 1958, is required with this modification.
(L. B. Smith Service Modification No. SM20T-6 dated June 23, 1958, 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 · 6
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1944 | 4 |
|---|---|
| 1945 | 1 |
| 1959 | 1 |