| Tail Number / N-Number | N321SX |
| Manufacturer | HARRINGTON BRUCE D |
| Model | SONEX |
| Manufacturer's Serial Number | 321 |
| 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 | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 1 engine |
| Kit Manufacturer | SONEX LTD |
| Kit Model | SONEX |
| Type of Registrant | Individual |
| Owner Name | KANE STEVEN M |
| Street | 3418 JULES LILLIAN DR NE |
| City | GRAND RAPIDS |
| State | MI |
| Zip Code | 49525-8620 |
| Region | Great Lakes |
| County | Kent County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2003-05-31 |
| Certificate Issue Date | 2021-05-18 |
| Last Action Date | 2021-05-18 |
| Expiration Date | 2028-05-31 |
| Status | Valid Registration |
| Mode S Code | 50671655 |
| Mode S Code Hex | A373AD |