| Tail Number / N-Number | N657WM |
| Manufacturer | CESSNA |
| Model | 421C |
| Manufacturer's Serial Number | 421C0474 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 8 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 2 engines |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | Individual |
| Owner Name | CHAVEZ LUIS R |
| Street | 8411 LOCKHEED DR STE 11 |
| City | EL PASO |
| State | TX |
| Zip Code | 79925-1259 |
| Region | Southwestern |
| County | El Paso County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1996-02-22 |
| Certificate Issue Date | 2012-06-12 |
| Last Action Date | 2021-01-19 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 52124273 |
| Mode S Code Hex | A8A8BB |