- Models
- Navion (Army L-17A), Navion A (Army L-17B and L-17C)
- Data sheet
- TCDSA-782
- Registered aircraft
- 633 matched by model
- Product
- Aircraft · Small airplane
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 19 KB | 888e70bc…e7ffc3e | FAA DRS (API key needed) |
On this page
The airworthiness directive
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.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 633
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1946 | 103 |
|---|---|
| 1947 | 133 |
| 1948 | 143 |
| 1949 | 78 |
| 1950 | 21 |
| 1951 | 1 |
| 1953 | 1 |
| 1956 | 1 |
| 1958 | 2 |
| 1959 | 1 |
| 1963 | 1 |
148 with no year recorded