| Tail Number / N-Number | N521DC |
| Manufacturer | DASSAULT |
| Model | FALCON 900 EX |
| Year Built | 2006 |
| Manufacturer's Serial Number | 608 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 21 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | HONEYWELL |
| Engine Model | TFE731-60-1C |
| Engine Type | Turbo-fan |
| Number of Engines | 3 engines |
| Thrust per Engine | 4,525 pounds-force (20.1 kN) |
| Total Thrust | 13,575 pounds-force (60.4 kN) |
| Type of Registrant | LLC |
| Owner Name | CAS TRANSPORTATION LLC |
| Street | PO BOX 1286 |
| City | DUBOIS |
| State | WY |
| Zip Code | 82513-1286 |
| Region | Northwest Mountain |
| County | Fremont County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2007-03-13 |
| Certificate Issue Date | 2018-01-17 |
| Last Action Date | 2020-08-19 |
| Expiration Date | 2028-01-31 |
| Status | Valid Registration |
| Mode S Code | 51506363 |
| Mode S Code Hex | A68CF3 |