| Tail Number / N-Number | N681X |
| Manufacturer | REIFERS ROBERT T |
| Model | ONEX |
| Year Built | 2013 |
| Manufacturer's Serial Number | ONX0068 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AEROVEE |
| Engine Model | 2.1 |
| Engine Type | 4 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 80 hp (60 kW) |
| Kit Manufacturer | SONEX AIRCRAFT LLC |
| Kit Model | ONEX |
| Type of Registrant | Individual |
| Owner Name | TURNER LLOYD D |
| Street | 8025 E 1290 N |
| City | SYRACUSE |
| State | IN |
| Zip Code | 46567-8601 |
| Region | Great Lakes |
| County | Kosciusko County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2013-08-28 |
| Certificate Issue Date | 2023-01-03 |
| Last Action Date | 2023-01-03 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 52204373 |
| Mode S Code Hex | A908FB |