49-12-02: Fuel Pumps
FAA order 49-12-02 is an airworthiness directive. The FAA's subject line: Fuel Pumps. 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), Navion A (Army L-17B and L-17C)
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 (784 characters)
49-12-02 NAVION: Applies to All Airplanes Equipped With Romec Engine-Driven Fuel Pumps.
To be accomplished as soon as possible, but not later than May 1, 1949.
On some of the Romec fuel pumps, a 1/16-inch hole has been drilled through the 1/8-inch pipe plug which closes the vent opening at the top of the pump. This is a fire hazard since, in the event of pump seal failure, fuel could squirt from this hole into the generator which is directly above the fuel pump, and into the engine compartment. It is therefore required that all drilled vent plugs be replaced by undrilled plugs.
The Ryan factory has accomplished this change in production, starting with airplane Serial Number 1823. Undrilled vent plugs are being painted with zinc chromate primer at the Ryan factory.
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/49-12-02.json · aircraft systems.