# N61708: 1988 Quad City Ultralight Acft CHALLENGER II

- Status: Valid registration
- Airframe: [Quad City Ultralight Acft CHALLENGER II](https://openairdocs.org/model/quad-city-ultralight-acft-challenger-ii) (registry code 059010Q, 2 seats)
- Engine: [Rotax 503 series](https://openairdocs.org/engine/rotax-503-series) (registry code 55564)
- Serial number: CH2 0888 CW 0352
- Year built: 1988
- Type: Fixed wing single engine
- Engine type: 2 cycle
- Airworthiness: Experimental, registered before 01/31/08
- Airworthiness date: January 28, 2008
- Certificate issued: May 19, 2014
- Expires: May 31, 2027
- Mode S code: A80B38
- Registered owner: [Krabill Ronald D](https://openairdocs.org/faa-owner/KRABILL%20RONALD%20D)
- Location: [Halsey, OR](https://openairdocs.org/faa-place/OR/Halsey)
- Owner type: Individual
- Owner's area on the map: 44.3833° N, 123.1223° W: Placed by OpenAirDocs at the center of ZIP code 97348, 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=61708
- Page: https://openairdocs.org/aircraft/N61708

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. The registry lists only the engine series, so ADs for every Rotax 503 model are included.

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

### Matched by airframe (Quad City Ultralight Acft CHALLENGER II)

None in force.

### Matched by engine (Rotax 503 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N61708.

## FAA accident and incident reports

None matched to N61708.

## 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 N61708

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N61708 before.

- [Cancelled 1977-12-01](https://openairdocs.org/deregistered/N61708-1977-12-01): Cessna T-50, S/N 1504. Owner: [Bixby Loren J](https://openairdocs.org/faa-owner/BIXBY%20LOREN%20J), [Muskegon, MI](https://openairdocs.org/faa-place/MI/Muskegon)

## Related

- Other Quad City Ultralight Acft CHALLENGER II aircraft: https://openairdocs.org/model/quad-city-ultralight-acft-challenger-ii/aircraft.md
- The Rotax 503 series engine: https://openairdocs.org/engine/rotax-503-series.md

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