| Tail Number / N-Number | N8420K |
| Manufacturer | STINSON |
| Model | 108-1 |
| Year Built | 1946 |
| Manufacturer's Serial Number | 108-1420 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | FRANKLIN |
| Engine Model | 6A4150 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 150 hp (112 kW) |
| Average Cruising Speed | 84 miles per hour |
| Type of Registrant | Individual |
| Owner Name | GADAMUS JAMES J |
| Street | PO BOX 237 |
| City | BROADUS |
| State | MT |
| Zip Code | 59317-0237 |
| Region | Northwest Mountain |
| County | Powder River County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1956-05-09 |
| Certificate Issue Date | 2013-11-01 |
| Last Action Date | 2022-11-28 |
| Expiration Date | 2029-11-30 |
| Status | Valid Registration |
| Mode S Code | 52704651 |
| Mode S Code Hex | AB89A9 |