| Tail Number / N-Number | N51SX |
| Manufacturer | MCKINNEY MICHAEL C |
| Model | SWEARINGEN SX 300 |
| Year Built | 2022 |
| Manufacturer's Serial Number | 55 |
| 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 | LYCOMING |
| Engine Model | IO-540-L1C5 |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 300 hp (224 kW) |
| Type of Registrant | Individual |
| Owner Name | WACH JOHN N |
| Street | 57 CITATION CIR |
| City | WHEATON |
| State | IL |
| Zip Code | 60189-3118 |
| Region | Great Lakes |
| County | DuPage County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2022-12-05 |
| Certificate Issue Date | 2021-05-13 |
| Last Action Date | 2021-05-13 |
| Expiration Date | 2028-05-31 |
| Status | Valid Registration |
| Mode S Code | 51460274 |
| Mode S Code Hex | A660BC |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N51SX.
| Tail Number / N-Number | N51SX |
| Manufacturer | VAN PELT MARTIN J |
| Model | PITTS S1S |
| Year Built | 1999 |
| Manufacturer's Serial Number | 001 |
| 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 | LYCOMING |
| Engine Model | I0360 SER A&C |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 200 hp (149 kW) |
| Kit Manufacturer | CHRISTEN INDUSTRIES |
| Kit Model | PITTS S1S |
| Type of Registrant | Individual |
| Owner Name | VAN PELT MARTIN J |
| Street | PO BOX 1681 |
| City | VENICE |
| State | FL |
| Zip Code | 34284-1681 |
| County | DuPage County |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1999-08-28 |
| Certificate Issue Date | 1998-10-29 |
| Last Action Date | 2004-11-16 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 2005-02-04 |