| Tail Number / N-Number | N521AG |
| Manufacturer | MOONEY AIRCRAFT CORP. |
| Model | M20K |
| Year Built | 1979 |
| Manufacturer's Serial Number | 25-0139 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | TSIO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 225 hp (168 kW) |
| Type of Registrant | LLC |
| Owner Name | AVIATION FURY LLC |
| Street | PO BOX 9711 |
| City | WASHINGTON |
| State | DC |
| Zip Code | 20016-9711 |
| Region | Eastern |
| County | District of Columbia |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1979-04-30 |
| Certificate Issue Date | 2013-01-10 |
| Last Action Date | 2021-08-31 |
| Expiration Date | 2029-01-31 |
| Status | Valid Registration |
| Mode S Code | 51506254 |
| Mode S Code Hex | A68CAC |