| Tail Number / N-Number | N403SX |
| Manufacturer | COOK KENNETH J |
| Model | SONEX |
| Year Built | 2004 |
| Manufacturer's Serial Number | 0403 |
| 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 |
| Type of Registrant | Individual |
| Owner Name | ALLEN TIMOTHY TAYLOR |
| Street | 258 WESTWATER CIR |
| City | FRUITA |
| State | CO |
| Zip Code | 81521-3066 |
| Region | Northwest Mountain |
| County | Mesa County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2004-11-30 |
| Certificate Issue Date | 2020-06-04 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-06-30 |
| Status | Valid Registration |
| Mode S Code | 51134554 |
| Mode S Code Hex | A4B96C |