| Tail Number / N-Number | N57AG |
| Manufacturer | BEECH |
| Model | B90 |
| Year Built | 1968 |
| Manufacturer's Serial Number | LJ-343 |
| 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 |
| Engine Model | PT6A SER |
| Engine Type | Turbo-prop |
| Number of Engines | 2 engines |
| Horsepower per Engine | 750 hp (560 kW) |
| Total Horsepower | 1,500 hp (1,119 kW) |
| Average Cruising Speed | 202 miles per hour |
| Type of Registrant | LLC |
| Owner Name | MONUMENT AVIATION LLC |
| Street | 230 AVEBURY DR |
| City | NORTH CHESTERFIELD |
| State | VA |
| Zip Code | 23236-3241 |
| Region | Eastern |
| County | Richmond city |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1998-06-11 |
| Certificate Issue Date | 2019-04-25 |
| Last Action Date | 2022-01-26 |
| Expiration Date | 2029-04-30 |
| Status | Valid Registration |
| Mode S Code | 51646027 |
| Mode S Code Hex | A74C17 |