| Tail Number / N-Number | N139DF |
| Manufacturer | AERO VODOCHODY |
| Model | L-39 |
| Year Built | 1981 |
| Manufacturer's Serial Number | 132121 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | HONEYWELL |
| Engine Model | TFE731-3R-1H |
| Engine Type | Turbo-fan |
| Number of Engines | 1 engine |
| Thrust | 3,700 pounds-force (16.5 kN) |
| Type of Registrant | LLC |
| Owner Name | CZECH SIX LLC |
| Street | 325 SETTLERS TRACE BLVD STE 300 |
| City | LAFAYETTE |
| State | LA |
| Zip Code | 70508-6061 |
| Region | Southwestern |
| County | Lafayette Parish |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2017-03-06 |
| Certificate Issue Date | 2014-05-06 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-05-31 |
| Status | Valid Registration |
| Mode S Code | 50116361 |
| Mode S Code Hex | A09CF1 |