| AD Number | 49-12-02 | Status | Active |
| Effective Date | Not specified | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | N/A |
| Product Type | ["Aircraft"] | Product Subtype | ["Small Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Sierra Hotel Aero, Inc. |
| Model(s) | Navion (Army L-17A) Navion A (Army L-17B and L-17C) |
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.