| Tail Number / N-Number | N40185 |
| Manufacturer | STINSON |
| Model | 108 |
| Year Built | 1946 |
| Manufacturer's Serial Number | 108-115 |
| 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 | BOSKO STEVEN J |
| Street | 3340 EL SUYO DR |
| City | SAN RAMON |
| State | CA |
| Zip Code | 94583-3032 |
| Region | Western-Pacific |
| County | Contra Costa County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Certificate Issue Date | 2019-01-02 |
| Last Action Date | 2021-08-27 |
| Expiration Date | 2029-01-31 |
| Status | Valid Registration |
| Mode S Code | 51131746 |
| Mode S Code Hex | A4B3E6 |