| Tail Number / N-Number | N6858C |
| Manufacturer | CESSNA |
| Model | 421C |
| Year Built | 1978 |
| Manufacturer's Serial Number | 421C0481 |
| 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 | CONT MOTOR |
| Engine Model | GTSI0-520-F-K |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 435 hp (325 kW) |
| Total Horsepower | 870 hp (649 kW) |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | LLC |
| Owner Name | SNS AIR LLC |
| Street | 3262 AVENUE F |
| City | BILLINGS |
| State | MT |
| Zip Code | 59102-6517 |
| Region | Northwest Mountain |
| County | Yellowstone County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1978-03-10 |
| Certificate Issue Date | 2016-08-03 |
| Last Action Date | 2022-07-18 |
| Expiration Date | 2029-08-31 |
| Status | Valid Registration |
| Mode S Code | 52214475 |
| Mode S Code Hex | A9193D |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N6858C.
| Tail Number / N-Number | N6858C |
| Manufacturer | LOCKHEED |
| Model | PV-2 |
| Year Built | 1957 |
| Manufacturer's Serial Number | 151201 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 10 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 129 miles per hour |
| Type of Registrant | Individual |
| Owner Name | YOUNG MARSHALL R |
| Street | 2905 CONTINENTAL NATIONAL BANK |
| City | FORT WORTH |
| State | TX |
| Zip Code | 76102 |
| Region | Southwestern |
| County | Yellowstone County |
| Certificate Issue Date | 1958-02-06 |
| Last Status | Valid Registration |
| Cancellation Date | 1970-10-19 |