| Tail Number / N-Number | N5121K |
| Manufacturer | AURAND THOMAS C |
| Model | VAN RV-4 |
| Year Built | 2007 |
| Manufacturer's Serial Number | 1308 |
| 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 | LYCOMING |
| Engine Model | O-320-D2A |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 160 hp (119 kW) |
| Kit Manufacturer | VANS AIRCRAFT INC |
| Kit Model | RV-4 |
| Type of Registrant | Individual |
| Owner Name | TEBBE FRANCIS L |
| Street | PO BOX 99 |
| City | MARYVILLE |
| State | IL |
| Zip Code | 62062-0099 |
| Region | Great Lakes |
| County | Madison County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2007-12-03 |
| Certificate Issue Date | 2016-10-20 |
| Last Action Date | 2022-05-29 |
| Expiration Date | 2029-10-31 |
| Status | Valid Registration |
| Mode S Code | 51465542 |
| Mode S Code Hex | A66B62 |