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FAA
Federal Aviation Administration Department of Transportation
Aviation Safety
AIRWORTHINESS DIRECTIVE
Generated by Aircraft-logs.com — March 24, 2026

AD 43-12-01 ACTIVE

Elevator Hinge Brackets
Key Information
AD Number 43-12-01 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) DC3A-S1C3G DC3A-S1CG DC3A-S4C4G DC3A-SC3G DC3A-SCG
Regulatory Text

43-12-01 DOUGLAS: (Was Service Note 4 of AD-669-3.) Applies to DC3A aircraft. \n\n\tAt each periodic inspection, check the elevator hinge brackets and if cracks are present the brackets should be replaced. Due to the possibility of vibration causing fatigue failures, continuous operation of the airplanes in the range of engine speeds between 1,300 and 1,600 r.p.m. should be avoided. A minimum engine speed of 1,700 r.p.m. during cruising flight is recommended. \n\n\t(Douglas Service Letter dated January 15, 1943, covers this same subject.)

AD 43-12-01 — Elevator Hinge Brackets
Printed from Aircraft-logs.com — 03/24/2026