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FAA
Federal Aviation Administration Department of Transportation
Aviation Safety
AIRWORTHINESS DIRECTIVE
Generated by Aircraft-logs.com — March 21, 2026

AD 46-39-05 ACTIVE

Main Fuel Line Supporting Brackets
Key Information
AD Number 46-39-05 Status Active
Effective Date Not specified Issue Date Not specified
Docket Number Unknown Amendment N/A
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
Regulatory Text

46-39-05 DOUGLAS: (Was Mandatory Note 6 of AD-762-7.) Applies Only to C-54B and Other C-54 Series Airplanes Having the C-54B Fuel System. \n\n\tTo be accomplished not later than December 1, 1946. \n\n\tThe main fuel line supporting brackets at wing Stations 357, 378, and 399 are subject to vibration failure and are to be replaced with redesigned brackets. In addition, the United Carr clips at wing Station 378 are to be replaced by Adel clips. \n\n\t(Douglas Service Bulletin No. DC-4-5 covers this same subject.)

AD 46-39-05 — Main Fuel Line Supporting Brackets
Printed from Aircraft-logs.com — 03/21/2026