Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N57521.
| Tail Number / N-Number | N57521 |
| Manufacturer | MOONEY AIRCRAFT CORP. |
| Model | M20K |
| Manufacturer's Serial Number | 25-1103 |
| 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 | Individual |
| Owner Name | GREENSPAN ROBERT |
| Street | 12 MAYHILL LN |
| City | DIX HILL |
| State | NY |
| Zip Code | 11746 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1987-02-11 |
| Certificate Issue Date | 1989-10-12 |
| Last Action Date | 2008-01-31 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2013-04-17 |
| Mode S Code | 51661664 |
| Mode S Code Hex | A763B4 |