46-21-01: Landing Gear Universal Joints

FAA order 46-21-01 is an airworthiness directive. The FAA's subject line: Landing Gear Universal Joints. It names Fairchild 24: about 242 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: landing gear.

What it applies to as the FAA lists it

Kind of product: Aircraft
Makes: Fairchild Industries, Inc.
Models: 24 C8, 24 C8A, 24 C8B, 24 C8D, 24 C8DS, 24 C8E, 24 C8ES, 24 C8F (Army UC-61J), 24 C8FS, 24G (Army UC-61H), 24GS, 24H, 24HS, 24J (Army UC-61B), 24JS, 24K (Army UC-61E), 24KS
On this site: Fairchild 24 242 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 (513 characters)

46-21-01	FAIRCHILD:  (Was Mandatory Note 6 of AD-702-2: 2 of AD-706-1; 4 of AD- 517-2; 5 of AD-535-2; 4 of AD-564-2; 5 of AD-633-2; 5 of AD-600-2; 4 of AD-667-2.)  Applies to Model 24 Series Aircraft. 

	Compliance required at next periodic inspection. 

	To correct the freezing of the upper and lower universal joints on the landing gear oleo shock struts, install new universal joints, Fairchild P/N 3330 and 3328. 

	(Fairchild Service Bulletin 46-24-1-A, revised December 23, 1946, covers this same subject.)

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 October 5, 2026. Connections as data: /graph/directive/46-21-01.json · aircraft systems.