| Tail Number / N-Number | N6681S |
| Manufacturer | BEECH |
| Model | C90 |
| Year Built | 1979 |
| Manufacturer's Serial Number | LJ-850 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 9 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W CANADA |
| Engine Model | PT6A-60A |
| Engine Type | Turbo-prop |
| Number of Engines | 2 engines |
| Horsepower per Engine | 1,050 hp (783 kW) |
| Total Horsepower | 2,100 hp (1,567 kW) |
| Average Cruising Speed | 201 miles per hour |
| Type of Registrant | LLC |
| Owner Name | N6681S LLC |
| Street | 415 N BENTON AVE |
| City | HELENA |
| State | MT |
| Zip Code | 59601-5041 |
| Region | Northwest Mountain |
| County | Lewis and Clark County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1979-05-21 |
| Certificate Issue Date | 2023-01-13 |
| Last Action Date | 2023-01-13 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 52152175 |
| Mode S Code Hex | A8D47D |