| Tail Number / N-Number | N8939U |
| Manufacturer | BEECH |
| Model | S35 |
| Year Built | 1965 |
| Manufacturer's Serial Number | D-7924 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | IO 520 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 285 hp (213 kW) |
| Average Cruising Speed | 150 miles per hour |
| Type of Registrant | Individual |
| Owner Name | SIEGFRIED ROBERT W II |
| Street | 711 MILLBROOK DR |
| City | DOWNERS GROVE |
| State | IL |
| Zip Code | 60516-4916 |
| Region | Great Lakes |
| County | DuPage County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1965-08-11 |
| Certificate Issue Date | 2003-04-08 |
| Last Action Date | 2022-08-20 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 53052037 |
| Mode S Code Hex | AC541F |