47-21-19: Control Clamps or Brass Ferrules
FAA order 47-21-19 is an airworthiness directive. The FAA's subject line: Control Clamps or Brass Ferrules. System: other and general.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Sky Enterprises, Inc.
- Models
- RC-3
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 (734 characters)
47-21-19 REPUBLIC: (Was Mandatory Note 9 of AD-769-2.) Applies to Model RC-3 Aircraft Serial Numbers 5 to 238, Inclusive.
Compliance required not later than the next 25 hours of operation subsequent to July 1, 1947, but in no case later than September 1, 1947.
Inspect parking brake, battery, mixture and carburetor heat flexible controls for presence of brass ferrule or AN 742D3 clamp on split sleeve at operating end of these controls. If clamp or ferrule is not installed, split metal sleeve can open permitting casing to slide out when control is actuated thus rendering the control ineffective. The above clamp should be installed immediately.
(Seabee Service News No. 10, dated January 13, 1947, covers this 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 November 6, 2026. Connections as data: /graph/directive/47-21-19.json · aircraft systems.