| Tail Number / N-Number | N36SX |
| Manufacturer | KOELZER DAVID J |
| Model | SONEX |
| Year Built | 2002 |
| Manufacturer's Serial Number | 0036 |
| 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 | KOELZER DAVID J |
| Street | 2930 BAKER ST |
| City | MARION |
| State | IA |
| Zip Code | 52302-9211 |
| Region | Central |
| County | Linn County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2002-07-11 |
| Certificate Issue Date | 2002-06-24 |
| Last Action Date | 2020-07-03 |
| Expiration Date | 2027-09-30 |
| Status | Valid Registration |
| Mode S Code | 51005631 |
| Mode S Code Hex | A40B99 |