| Tail Number / N-Number | N1666R |
| Manufacturer | HOLTZ RODNEY R |
| Model | CHALLENGER II |
| Year Built | 2008 |
| Manufacturer's Serial Number | CH2-0899-1897 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Light Sport |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | 503 DCDI |
| Engine Type | 2 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 52 hp (39 kW) |
| Type of Registrant | Individual |
| Owner Name | REGISTRATION PENDING |
| Street | 1819 VANDERBILT DR |
| City | FORT WAYNE |
| State | IN |
| Zip Code | 46845-2369 |
| Region | Great Lakes |
| County | Allen County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2008-11-07 |
| Last Action Date | 2023-01-25 |
| Status | Registration pending |
| Mode S Code | 50205462 |
| Mode S Code Hex | A10B32 |