| Tail Number / N-Number | N521BF |
| Manufacturer | AIR TRACTOR INC |
| Model | AT-602 |
| Year Built | 2020 |
| Manufacturer's Serial Number | 602-1313 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W CANADA |
| Engine Model | PT6A-65AG |
| Engine Type | Turbo-prop |
| Number of Engines | 1 engine |
| Horsepower | 1,300 hp (970 kW) |
| Type of Registrant | LLC |
| Owner Name | BS FLYING SERVICE LLC |
| Street | 1232 CHOPTANK RD |
| City | MIDDLETOWN |
| State | DE |
| Zip Code | 19709-9038 |
| Region | Eastern |
| County | New Castle County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Restricted |
| Airworthiness Date | 2020-12-01 |
| Certificate Issue Date | 2022-01-14 |
| Last Action Date | 2022-01-14 |
| Expiration Date | 2029-01-31 |
| Status | Valid Registration |
| Mode S Code | 51506304 |
| Mode S Code Hex | A68CC4 |