| Tail Number / N-Number | N31MM |
| Manufacturer | CESSNA |
| Model | 421C |
| Manufacturer's Serial Number | 421C0819 |
| 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) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | LLC |
| Owner Name | PENCE AIR LLC |
| Street | PO BOX 307 |
| City | EDINBURG |
| State | VA |
| Zip Code | 22824-0307 |
| Region | Eastern |
| County | Shenandoah County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1980-01-23 |
| Certificate Issue Date | 2019-03-11 |
| Last Action Date | 2021-10-21 |
| Expiration Date | 2029-03-31 |
| Status | Valid Registration |
| Mode S Code | 50642627 |
| Mode S Code Hex | A34597 |