| Tail Number / N-Number | N9721M |
| Manufacturer | MOONEY |
| Model | M20C |
| Year Built | 1967 |
| Manufacturer's Serial Number | 670138 |
| 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 | LYCOMING |
| Engine Model | I0360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Average Cruising Speed | 127 miles per hour |
| Type of Registrant | Individual |
| Owner Name | MARTIN VINCENT J |
| Street | 14626 RAPP RD |
| City | NEVADA CITY |
| State | CA |
| Zip Code | 95959-9031 |
| Region | Western-Pacific |
| County | Nevada County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1967-08-08 |
| Certificate Issue Date | 2016-02-25 |
| Last Action Date | 2021-09-27 |
| Expiration Date | 2029-02-28 |
| Status | Valid Registration |
| Mode S Code | 53306632 |
| Mode S Code Hex | AD8D9A |