| Tail Number / N-Number | N81XX |
| Manufacturer | HOWARD JAMES J |
| Model | ONEX |
| Manufacturer's Serial Number | 0108 |
| 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) |
| Number of Engines | 1 engine |
| Kit Manufacturer | SONEX AIRCRAFT LLC |
| Kit Model | ONEX |
| Type of Registrant | Individual |
| Owner Name | CULWELL LEWIS D |
| Street | 6105 ELKHORN RD |
| City | HELENA |
| State | MT |
| Zip Code | 59602-9797 |
| Region | Northwest Mountain |
| County | Lewis and Clark County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2020-08-11 |
| Last Action Date | 2020-08-11 |
| Expiration Date | 2027-08-31 |
| Status | Valid Registration |
| Mode S Code | 52604446 |
| Mode S Code Hex | AB0926 |