47-31-02: Carburetor Vapor Return Line
FAA order 47-31-02 is an airworthiness directive. The FAA's subject line: Carburetor Vapor Return Line. System: engine.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Sierra Hotel Aero, Inc.
- Models
- Navion (Army L-17A)
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 (462 characters)
47-31-02 NAVION: (Was Mandatory Note 11 of AD-782-3.) Applies to Serial Numbers NAV-4-2 Through NAV-4-850.
To be accomplished not later than November 1, 1947.
Remove carburetor vapor return line hose P/N 75696 and install fire-resistant hose P/N 76701. This change is necessary to prevent premature failure of the vapor return line in the event of an engine compartment fire.
(NAA Field Service Bulletin No. 23 dated April 11, 1947, covers this rework.)
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/47-31-02.json · aircraft systems.