| Tail Number / N-Number | N78877 |
| Manufacturer | MOONEY |
| Model | M20D |
| Year Built | 1965 |
| Manufacturer's Serial Number | 254 |
| 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 | O&VO-360 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 | OBRIEN GARRETT G |
| Street | 17298 ARMSTRONG RD |
| City | SHEEP RANCH |
| State | CA |
| Zip Code | 95246-9430 |
| Region | Western-Pacific |
| County | Calaveras County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1965-02-02 |
| Certificate Issue Date | 1992-12-01 |
| Last Action Date | 2022-04-11 |
| Expiration Date | 2029-04-30 |
| Status | Valid Registration |
| Mode S Code | 52530653 |
| Mode S Code Hex | AAB1AB |