| Tail Number / N-Number | N54GJ |
| Manufacturer | JOHNSON GARY |
| Model | CHALLENGER II |
| Year Built | 1994 |
| Manufacturer's Serial Number | CH2-0993-1025 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Light Sport |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | 503 SERIES |
| Engine Type | 2 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 52 hp (39 kW) |
| Type of Registrant | Individual |
| Owner Name | JOHNSON GARY F |
| Street | 420 SCARBROUGH LOOP |
| City | HUMBOLDT |
| State | TN |
| Zip Code | 38343-8426 |
| Region | Central |
| County | Madison County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2008-01-27 |
| Certificate Issue Date | 2007-10-17 |
| Last Action Date | 2021-07-26 |
| Expiration Date | 2028-12-31 |
| Status | Valid Registration |
| Mode S Code | 51553062 |
| Mode S Code Hex | A6D632 |