| Tail Number / N-Number | N12SX |
| Manufacturer | SONEX LTD/MONNETT JOHN T JR |
| Model | SONEX |
| Manufacturer's Serial Number | 001 |
| 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 | Corporation |
| Owner Name | EAA AVIATION FOUNDATION INC |
| Street | PO BOX 3086 |
| City | OSHKOSH |
| State | WI |
| Zip Code | 54903-3086 |
| Region | Great Lakes |
| County | Winnebago County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2002-06-06 |
| Certificate Issue Date | 2022-04-20 |
| Last Action Date | 2022-04-20 |
| Expiration Date | 2029-04-30 |
| Status | Valid Registration |
| Mode S Code | 50051377 |
| Mode S Code Hex | A052FF |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N12SX.
| Tail Number / N-Number | N12SX |
| Manufacturer | BELL |
| Model | 206A |
| Manufacturer's Serial Number | 435 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 112 miles per hour |
| County | Winnebago County |
| Last Status | N-Number Assigned – but has not yet been registered |