| Tail Number / N-Number | N421MB |
| Manufacturer | CESSNA |
| Model | 421C |
| Manufacturer's Serial Number | 421C0849 |
| 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 | IOWA TRENCHLESS LLC |
| Street | PO BOX 846 |
| City | PANORA |
| State | IA |
| Zip Code | 50216-0846 |
| Region | Central |
| County | Guthrie County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1980-04-14 |
| Certificate Issue Date | 2019-06-27 |
| Last Action Date | 2022-01-19 |
| Expiration Date | 2029-06-30 |
| Status | Valid Registration |
| Mode S Code | 51200153 |
| Mode S Code Hex | A5006B |