# N729U: 1992 Unger John L KITFOX II

- Status: Valid registration
- Airframe: [Unger John L KITFOX II](https://openairdocs.org/model/unger-john-l-kitfox-ii) (registry code 05618S8, 2 seats)
- Engine: [Bombardier ROTAX (ALL)](https://openairdocs.org/engine/bombardier-rotax-all) (registry code 09050)
- Serial number: 729
- Year built: 1992
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: May 7, 1992
- Certificate issued: April 20, 2017
- Expires: April 30, 2030
- Mode S code: A9C6BD
- Registered owner: [Leffler Richard A](https://openairdocs.org/faa-owner/LEFFLER%20RICHARD%20A)
- Location: [Prospect, OR](https://openairdocs.org/faa-place/OR/Prospect)
- Owner type: Individual
- Owner's area on the map: 42.7819° N, 122.4947° W: Placed by OpenAirDocs at the center of ZIP code 97536, 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=729U
- Page: https://openairdocs.org/aircraft/N729U

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 (Unger John L KITFOX II)

None in force.

### Matched by engine (Bombardier ROTAX (ALL))

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB WPR23LA243](https://openairdocs.org/ntsb/WPR23LA243), Jun 24, 2023: Kitfox 2 (N729U), Cave Junction, OR, substantial damage. Probable cause: The pilot’s failure to maintain proper airspeed and his exceedance of the airplane’s critical angle of attack during takeoff, which resulted in an aerodynamic stall.

## 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.

- [Accident 20230624007889A](https://openairdocs.org/incident/20230624007889A), Jun 24, 2023: Unger John L KITFOX II (N729U), Cave Junction, OR, Substantial damage. On the day prior to the accident the pilot flew from OG31 to 3S4 and then practiced landings, slips, and ground control with no noted issues. On the accident…

## 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 Unger John L KITFOX II aircraft: https://openairdocs.org/model/unger-john-l-kitfox-ii/aircraft.md
- The Bombardier ROTAX (ALL) engine: https://openairdocs.org/engine/bombardier-rotax-all.md

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