| Tail Number / N-Number | N991AK |
| Manufacturer | BEECH |
| Model | C-99 |
| Year Built | 1982 |
| Manufacturer's Serial Number | U-189 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 17 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W CANADA |
| Engine Model | PT6A-36 |
| 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 | Corporation |
| Owner Name | LAKE CLARK AIR INC |
| Street | THE FARM LODGE BOX 1 |
| City | PORT ALSWORTH |
| State | AK |
| Zip Code | 99653 |
| Region | Alaskan |
| County | Dillingham Census Area |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2015-12-08 |
| Certificate Issue Date | 2015-12-08 |
| Last Action Date | 2021-07-20 |
| Expiration Date | 2028-12-31 |
| Status | Valid Registration |
| Mode S Code | 53353144 |
| Mode S Code Hex | ADD664 |