# N4704J: 2006 Bradley J Jilek CHALLENGER II

- Status: Valid registration
- Airframe: [Bradley J Jilek CHALLENGER II](https://openairdocs.org/model/bradley-j-jilek-challenger-ii) (registry code 05631V6, 2 seats)
- Engine: [Rotax 503ULDCDI](https://openairdocs.org/engine/rotax-503uldcdi) (registry code 55568)
- Serial number: CH2-1005-2688
- Year built: 2006
- Type: Fixed wing single engine
- Engine type: 2 cycle
- Kit: Quad City Ultralight Acft Corp CHALLENGER II
- Airworthiness: Experimental, amateur built
- Airworthiness date: December 7, 2013
- Certificate issued: June 5, 2012
- Expires: June 30, 2028
- Mode S code: A5C407
- Registered owner: [Jilek Bradley J](https://openairdocs.org/faa-owner/JILEK%20BRADLEY%20J)
- Location: [Birchwood, WI](https://openairdocs.org/faa-place/WI/Birchwood)
- Owner type: Individual
- Owner's area on the map: 45.6764° N, 91.5324° W: Placed by OpenAirDocs at the center of ZIP code 54817, within about 7 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4704J
- Page: https://openairdocs.org/aircraft/N4704J

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Bradley J Jilek CHALLENGER II)

None in force.

### Matched by engine (Rotax 503ULDCDI)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N4704J.

## FAA accident and incident reports

None matched to N4704J.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Earlier aircraft with N4704J

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4704J before.

- [Cancelled 1995-10-25](https://openairdocs.org/deregistered/N4704J-1995-10-25): Beech A23-24, S/N MA166. Second triennial mailing, no response. Owner: [Antweiler William L](https://openairdocs.org/faa-owner/ANTWEILER%20WILLIAM%20L), [Columbia, MO](https://openairdocs.org/faa-place/MO/Columbia)

## Related

- Other Bradley J Jilek CHALLENGER II aircraft: https://openairdocs.org/model/bradley-j-jilek-challenger-ii/aircraft.md
- The Rotax 503ULDCDI engine: https://openairdocs.org/engine/rotax-503uldcdi.md

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