| Tail Number / N-Number | N121SG |
| Manufacturer | AMERICAN CHAMPION AIRCRAFT |
| Model | 8KCAB |
| Year Built | 2006 |
| Manufacturer's Serial Number | 1036-2007 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | 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 | AEIO-360-H1B |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | LLC |
| Owner Name | JOHNS AVIATION LLC |
| Street | 1075 COX RD |
| City | DAWSON |
| State | GA |
| Zip Code | 39842-3603 |
| Region | Southern |
| County | Terrell County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2007-03-20 |
| Certificate Issue Date | 2021-02-01 |
| Last Action Date | 2021-02-01 |
| Expiration Date | 2028-02-29 |
| Status | Valid Registration |
| Mode S Code | 50054400 |
| Mode S Code Hex | A05900 |