| Tail Number / N-Number | N257M |
| Manufacturer | BEECH |
| Model | J35 |
| Year Built | 1958 |
| Manufacturer's Serial Number | D-5604 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | I0-470 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 260 hp (194 kW) |
| Average Cruising Speed | 150 miles per hour |
| Type of Registrant | Individual |
| Owner Name | WILLIS CHARLES A |
| Street | 1121 FORREST DR |
| City | ARLINGTON |
| State | TX |
| Zip Code | 76012-2406 |
| Region | Southwestern |
| County | Tarrant County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1958-05-21 |
| Certificate Issue Date | 1991-06-18 |
| Last Action Date | 2020-03-09 |
| Expiration Date | 2027-08-31 |
| Status | Valid Registration |
| Mode S Code | 50471222 |
| Mode S Code Hex | A27292 |