| Tail Number / N-Number | N4704J |
| Manufacturer | BRADLEY J JILEK |
| Model | CHALLENGER II |
| Year Built | 2006 |
| Manufacturer's Serial Number | CH2-1005-2688 |
| 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 | ROTAX |
| Engine Model | 503ULDCDI |
| Engine Type | 2 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 52 hp (39 kW) |
| Kit Manufacturer | QUAD CITY ULTRALIGHT ACFT CORP |
| Kit Model | CHALLENGER II |
| Type of Registrant | Individual |
| Owner Name | JILEK BRADLEY J |
| Street | N9336 TOWNLINE RD |
| City | BIRCHWOOD |
| State | WI |
| Zip Code | 54817-9516 |
| Region | Great Lakes |
| County | Washburn County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2013-12-07 |
| Certificate Issue Date | 2012-06-05 |
| Last Action Date | 2021-01-25 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 51342007 |
| Mode S Code Hex | A5C407 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4704J.
| Tail Number / N-Number | N4704J |
| Manufacturer | BEECH |
| Model | A23-24 |
| Manufacturer's Serial Number | MA166 |
| 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) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 116 miles per hour |
| Type of Registrant | Individual |
| Owner Name | ANTWEILER WILLIAM L |
| Street | 2218 BUSHNELL |
| City | COLUMBIA |
| State | MO |
| Zip Code | 65201 |
| County | Washburn County |
| Country | US |
| Certificate Issue Date | 1988-02-11 |
| Last Action Date | 1991-03-30 |
| Last Status | A second attempt has been made at mailing a Triennial Aircraft Registration form to the owner with no response |
| Cancellation Date | 1995-10-25 |