- Models
- C54-DC, C54A-DC, C54B-DC, C54D-DC, C54E-DC, C54G-DC, DC-4
- Data sheet
- TCDSA-762
- Registered aircraft
- 4 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 | ba7931c4…f5eae5d | FAA DRS (API key needed) |
On this page
The airworthiness directive
48-02-02 DOUGLAS: Applies to C-54 and DC-4 Aircraft With Wilcolator Fire Detectors Installed in the Engine Power Section of the Nacelle.
Compliance required by next engine change.
Revise the method of attachment of the A-4981 Wilcolator fire detectors located on the cowl flap support wing in zone 1 by clamping the detector to its mounting plate with a retainer strip of 0.062-thickness low carbon steel sheet, cadmium plated, secured with the same screws which attach the detector to the support box. Failure of the supports is caused by vibration during engine operation.
(Douglas Service Bulletin DC-4 No. 75 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 · 4
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.