49-12-01: Aileron Trim Tab

FAA order 49-12-01 is an airworthiness directive. The FAA's subject line: Aileron Trim Tab. It names Curtiss Wright C-46: about 8 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: flight controls.

What it applies to as the FAA lists it

Kind of product: Aircraft
Makes: Airlift International, Inc.; Curtiss-Wright Corporation; Flying Tiger Line, Inc.; L. B. Smith Aircraft Corporation; Skyways International Trading and Transport Co.; Tempo Design Corporation
Models: C-46A, C-46D, C-46F, C-46R, C-46E, C-46A, C-46D, C-46E, C-46F, C-46A, C-46D, C-46F, C-46F, C-46/CW20-T, Super C-46/CW20-T
On this site: Curtiss Wright C-46 8 registered

Dates and paperwork

Docket: Unknown
Status: Current
The FAA's document: Read the order on the FAA's site

The order itself the regulatory text, as published

Show the full text (1,012 characters)

49-12-01   CURTISS-WRIGHT  Applies to Model C-46 Series aircraft equipped with Aileron Tab Motor Bracket Assembly, Curtiss-Wright P/N 20-030-5050. 

Compliance required within 25 hours' time in service after the effective date of this amendment, unless already accomplished within the last 475 hours' time in service, and at intervals thereafter not to exceed 500 hours' time in service from the last inspection. 

	Inspect the aileron trim tab motor support bracket (P/N S-20-030-5050) attached to the aft face of the 70 percent rear spar at wing Station 178.36 for cracks. Defective parts should be replaced. 

	Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA Southern Region, may adjust the repetitive inspection intervals specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase. 

	Revised December 28, 1964.

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/49-12-01.json · aircraft systems.