| Tail Number / N-Number | N8421K |
| Manufacturer | STINSON |
| Model | 108-1 |
| Year Built | 1946 |
| Manufacturer's Serial Number | 108-1421 |
| 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 | ALBERS MICHAEL W |
| Street | PO BOX 789 |
| City | ASHLAND |
| State | OH |
| Zip Code | 44805-0789 |
| Region | Great Lakes |
| County | Ashland County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1966-07-07 |
| Certificate Issue Date | 2015-06-15 |
| Last Action Date | 2021-01-19 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 52704714 |
| Mode S Code Hex | AB89CC |