| Tail Number / N-Number | N55539 |
| Manufacturer | REPUBLIC |
| Model | AT12 |
| Year Built | 1940 |
| Manufacturer's Serial Number | 483-38 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P & W |
| Engine Model | R-1830 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 1,350 hp (1,007 kW) |
| Average Cruising Speed | 127 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | PLANES OF FAME AIR MUSEUM |
| Street | 14998 CAL AERO DR |
| City | CHINO |
| State | CA |
| Zip Code | 91710-9056 |
| Region | Western-Pacific |
| County | San Bernardino County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1979-07-26 |
| Certificate Issue Date | 2006-03-03 |
| Last Action Date | 2022-08-23 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 51612341 |
| Mode S Code Hex | A714E1 |