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FAA
Federal Aviation Administration Department of Transportation
Aviation Safety
AIRWORTHINESS DIRECTIVE
Generated by Aircraft-logs.com — March 25, 2026

AD 47-02-03 ACTIVE

Accumulator
Key Information
AD Number 47-02-03 Status Active
Effective Date March 27, 1980 Issue Date Not specified
Docket Number Unknown Amendment 39-3720
Product Type ["Aircraft"] Product Subtype ["Large Airplane"]
CFR Part --- - Part 39 CFR Section N/A
Citation This information is not available.
Applicability
Manufacturer(s) The Boeing Company
Model(s) C54-DC C54A-DC C54B-DC C54D-DC C54E-DC C54G-DC DC-4
Regulatory Text

47-02-03 MCDONNELL DOUGLAS: Amendment 39-3720. (Was Mandatory Note 11 of AD-762-7.) Applies to C-54 and DC-4 Aircraft. \n\n\tTo be accomplished not later than August 1, 1947. \n\n\tBecause of failures in service of the main 9" Douglas aluminum accumulator, it is necessary to replace it with at least one 7 1/2" steel accumulator, Bendix P/N 406920 or Vickers P/N AA14308B, or Vickers 10" accumulator Model AA-14310. \n\n\t(Douglas Service Bulletin DC-4 No. 9 and Addendum dated January 6, 1956 cover the same subject.) \n\n\tThis Amendment 39-3720 becomes effective March 27, 1980.

AD 47-02-03 — Accumulator
Printed from Aircraft-logs.com — 03/25/2026