# N4854K: 2005 Quad City Ultralight CHALLENGER II LW

- Status: Valid registration
- Airframe: [Quad City Ultralight CHALLENGER II LW](https://openairdocs.org/model/quad-city-ultralight-challenger-ii-lw) (registry code 05901YQ, 2 seats)
- Engine: [Rotax 503UL](https://openairdocs.org/engine/rotax-503ul) (registry code 55565)
- Serial number: CH206032327
- Year built: 2005
- Type: Fixed wing single engine
- Engine type: 2 cycle
- Airworthiness: Experimental, amateur built
- Airworthiness date: January 27, 2007
- Certificate issued: January 23, 2023
- Expires: January 31, 2030
- Mode S code: A5FE1A
- Registered owner: [Doughty Stuart R](https://openairdocs.org/faa-owner/DOUGHTY%20STUART%20R)
- Location: [Fayetteville, AR](https://openairdocs.org/faa-place/AR/Fayetteville)
- Owner type: Individual, fractional ownership
- Owner's area on the map: 36.1056° N, 94.2962° W: Placed by OpenAirDocs at the center of ZIP code 72704, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4854K
- Page: https://openairdocs.org/aircraft/N4854K

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 (Quad City Ultralight CHALLENGER II LW)

None in force.

### Matched by engine (Rotax 503UL)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N4854K.

## FAA accident and incident reports

None matched to N4854K.

## 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 N4854K

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4854K before.

- [Cancelled (date not recorded)](https://openairdocs.org/deregistered/N4854K-undated): Ryan NAVION A, S/N NAV41854. Triennial form not returned

## Related

- Other Quad City Ultralight CHALLENGER II LW aircraft: https://openairdocs.org/model/quad-city-ultralight-challenger-ii-lw/aircraft.md
- The Rotax 503UL engine: https://openairdocs.org/engine/rotax-503ul.md

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