| Tail Number / N-Number | N521TM |
| Manufacturer | CESSNA |
| Model | 550 |
| Year Built | 1992 |
| Manufacturer's Serial Number | 550-0705 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 8 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Engine Manufacturer | P&W CANADA |
| Engine Model | JT15D-4 |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 2,500 pounds-force (11.1 kN) |
| Total Thrust | 5,000 pounds-force (22.2 kN) |
| Type of Registrant | Corporation |
| Owner Name | IDAHO POWER COMPANY |
| Street | 1221 WEST IDAHO |
| City | BOISE |
| State | ID |
| Zip Code | 83702 |
| Region | Northwest Mountain |
| County | Ada County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1992-08-22 |
| Certificate Issue Date | 1992-09-04 |
| Last Action Date | 2021-01-11 |
| Expiration Date | 2028-05-31 |
| Status | Valid Registration |
| Mode S Code | 51507132 |
| Mode S Code Hex | A68E5A |