| Tail Number / N-Number | N556ST |
| Manufacturer | GREG JOHNSON |
| Model | CALIDUS |
| Manufacturer's Serial Number | C00294 |
| Aircraft Type | Rotorcraft |
| 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 | ROTAX |
| Engine Model | 912ULS SERIES |
| Engine Type | 4 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 100 hp (75 kW) |
| Kit Manufacturer | AUTOGYRO GMBH |
| Kit Model | CALIDUS |
| Type of Registrant | Individual |
| Owner Name | EARLEY MARLIN EUGENE |
| Street | 1353 WINDSTONE DR |
| City | WACO |
| State | TX |
| Zip Code | 76712-8581 |
| Region | Southwestern |
| County | McLennan County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2014-03-20 |
| Certificate Issue Date | 2020-03-25 |
| Last Action Date | 2022-10-17 |
| Expiration Date | 2030-03-31 |
| Status | Valid Registration |
| Mode S Code | 51613527 |
| Mode S Code Hex | A71757 |