| Tail Number / N-Number | N81SU |
| Manufacturer | BEECH |
| Model | C90A |
| Year Built | 1989 |
| Manufacturer's Serial Number | LJ-1194 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 9 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W |
| Engine Model | PT6A SER |
| Engine Type | Turbo-prop |
| Number of Engines | 2 engines |
| Horsepower per Engine | 750 hp (560 kW) |
| Total Horsepower | 1,500 hp (1,119 kW) |
| Type of Registrant | LLC |
| Owner Name | MEDARY AVIATION LLC |
| Street | 815 MEDARY AVE |
| City | BROOKINGS |
| State | SD |
| Zip Code | 57006-1303 |
| Region | Great Lakes |
| County | Brookings County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1989-02-23 |
| Certificate Issue Date | 2021-05-22 |
| Last Action Date | 2021-05-22 |
| Expiration Date | 2028-05-31 |
| Status | Valid Registration |
| Mode S Code | 52604246 |
| Mode S Code Hex | AB08A6 |