| Tail Number / N-Number | N121B |
| Manufacturer | BEECH |
| Model | E-90 |
| Year Built | 1972 |
| Manufacturer's Serial Number | LW-21 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 10 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | U/A CANADA |
| Engine Model | PT6A-27-28 |
| Engine Type | Turbo-prop |
| Number of Engines | 2 engines |
| Horsepower per Engine | 680 hp (507 kW) |
| Total Horsepower | 1,360 hp (1,015 kW) |
| Type of Registrant | LLC |
| Owner Name | ARGO AVIATION LLC |
| Street | 19 MARKET ST |
| City | POTSDAM |
| State | NY |
| Zip Code | 13676-2035 |
| Region | Eastern |
| County | St. Lawrence County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1972-09-12 |
| Certificate Issue Date | 2013-12-10 |
| Last Action Date | 2022-09-08 |
| Expiration Date | 2029-12-31 |
| Status | Valid Registration |
| Mode S Code | 50053602 |
| Mode S Code Hex | A05782 |