# N901GH: 1990 Quad City/Houston Greg CHALLENGER II

- Status: Valid registration
- Airframe: [Quad City/Houston Greg CHALLENGER II](https://openairdocs.org/model/quad-city-houston-greg-challenger-ii) (registry code 05904BF, 2 seats)
- Engine: [Rotax 503DC](https://openairdocs.org/engine/rotax-503dc) (registry code 55582)
- Serial number: CH20990W0559
- Year built: 1990
- Type: Fixed wing single engine
- Engine type: 2 cycle
- Airworthiness: Experimental, registered before 01/31/08
- Airworthiness date: December 8, 2007
- Certificate issued: August 19, 2014
- Expires: August 31, 2027
- Mode S code: AC7381
- Registered owner: [Norman Monroe E](https://openairdocs.org/faa-owner/NORMAN%20MONROE%20E)
- Location: [Duvall, WA](https://openairdocs.org/faa-place/WA/Duvall)
- Owner type: Individual
- Owner's area on the map: 47.7366° N, 121.9338° W: Placed by OpenAirDocs at the center of ZIP code 98019, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=901GH
- Page: https://openairdocs.org/aircraft/N901GH

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/Houston Greg CHALLENGER II)

None in force.

### Matched by engine (Rotax 503DC)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N901GH.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Incident 20090420005629I](https://openairdocs.org/incident/20090420005629I), Apr 20, 2009: Amtr CHALLENGERII (N901GH), Enumclaw, WA, Minor damage. (-23) On 04/20/2009 at approximately 1920 local time [privacy data omitted] the pilot of N901GH an experimental aircraft. Departed Enumclaw municipal airport.…

## 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.

## Related

- Other Quad City/Houston Greg CHALLENGER II aircraft: https://openairdocs.org/model/quad-city-houston-greg-challenger-ii/aircraft.md
- The Rotax 503DC engine: https://openairdocs.org/engine/rotax-503dc.md

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