| Tail Number / N-Number | N9558K |
| Manufacturer | STINSON |
| Model | 108-2 |
| Manufacturer's Serial Number | 108-2558 |
| 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 | 6A4165 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 165 hp (123 kW) |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | Individual |
| Owner Name | JOHNSON ALAN L |
| Street | 2626 24TH AVE SW |
| City | PINE RIVER |
| State | MN |
| Zip Code | 56474-4000 |
| Region | Great Lakes |
| County | Cass County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1956-09-19 |
| Certificate Issue Date | 2013-12-13 |
| Last Action Date | 2022-07-12 |
| Expiration Date | 2029-12-31 |
| Status | Valid Registration |
| Mode S Code | 53245264 |
| Mode S Code Hex | AD4AB4 |