| OL | |
|---|---|
| |
| OA-1A San Francisco (26-431) of the U.S. Army Pan American Flight | |
| Role | Amphibious observation aircraft |
| Manufacturer | Loening |
| Designer | Grover Loening |
| First flight | 1923 |
| Primary users | United States Navy United States Army Air Corps |
| Number built | 165 |
The Loening OL, also known as the Loening Amphibian, is an American two-seat amphibious biplane designed by Grover Loening and built by Loening for the United States Army Air Corps and the United States Navy.