- 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 | 20 KB | 363904ea…8f7ca7e | FAA DRS (API key needed) |
On this page
The airworthiness directive
51-20-01 CURTISS-WRIGHT Applies to Model C-46 Series aircraft equipped with C-4 Cockpit Light Assembly.
Compliance required within 100 hours' time in service after the effective date of this amendment unless already accomplished.
To eliminate an electrical fire hazard existing in the pilot's compartment, the following rework must be accomplished:
1. Rework the C-4 cockpit light rheostat assembly in accordance with Figure 2. Fabricate insulator strip per Figure 2(a), and install as shown in Figure 2(b).
SECTIONAL VIEW OF COCKPIT LIGHT CASE - TYPE C-4A & C-4, WITH RHEOSTAT INSULATOR INSTALLED FIGURE 2
(U.S.A.F.T.O. No. 03-5G-12, dated September 8, 1950, covers this same subject.)
2. Revise the wiring to the C-4 lamp assembly as shown in Figure 3.
(Page 410D, Figure 301B of AN 01-25L-2 covers this same subject.)
Revised December 28, 1964.
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 |