- Models
- C54-DC, DC-4
- Data sheet
- TCDSA-762
- 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.
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The airworthiness directive
47-02-06 DOUGLAS: (Was Service Note 3 of AD-762-7.) Applies to C-54-DC Series Airplanes Incorporating Brake Pressure Accumulators and All DC-4's up to Serial Number 43065.
Rework the hydraulic hand pump shutoff valve 5241991 by replacing the valve retainer, spring and plunger with a sleeve and new type packings. The existing P/N 5241991 and 4242103 are to be removed and Nos. 2343816-4 and 2343816-6 restamped on the valve assembly and valve body, respectively. Also, change placard at the hand pump shutoff valve control to read "brakes, cowl flaps, nose wheel steering and windshield wiper" in the forward position and "landing gear, wing flaps, and main accumulator" in the rear position.
(Douglas Service Bulletin DC-4 No. 3, covers this same subject.)
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.