# N529MW: 2017 Mark O Treidel AR-1

- Status: Valid registration
- Airframe: [Mark O Treidel AR-1](https://openairdocs.org/model/mark-o-treidel-ar-1) (registry code 056358L, 2 seats)
- Engine: [Rotax 914UL](https://openairdocs.org/engine/rotax-914ul) (registry code 55553)
- Serial number: 0014
- Year built: 2017
- Type: Rotorcraft
- Engine type: 4 cycle
- Airworthiness: Experimental, amateur built
- Airworthiness date: May 2, 2017
- Certificate issued: April 17, 2017
- Expires: April 30, 2030
- Mode S code: A6AB85
- Registered owner: [Treidel Mark O](https://openairdocs.org/faa-owner/TREIDEL%20MARK%20O)
- Location: [Englewood, CO](https://openairdocs.org/faa-place/CO/Englewood)
- Owner type: Individual
- Owner's area on the map: 39.6120° N, 104.8828° W: Placed by OpenAirDocs at the center of ZIP code 80111, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=529MW
- Page: https://openairdocs.org/aircraft/N529MW

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 (Mark O Treidel AR-1)

None in force.

### Matched by engine (Rotax 914UL)

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 CEN26LA067](https://openairdocs.org/ntsb/CEN26LA067), Dec 16, 2025: Mark O Treidel American Ranger AR-1 (N529MW), Denver, CO, substantial damage. Probable cause: The pilot’s failure to attain rotor RPM and maintain proper rotor disc angle during takeoff which resulted in a rotor strike with the rudder.

## 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 20251216019779A](https://openairdocs.org/incident/20251216019779A), Dec 16, 2025: Mark O Treidel AR-1 (N529MW), Watkins, CO, Substantial damage. On 12/16/2005 at 1045 MDT an experimental gyrocopter leaving Colorado Air And Space Port experienced a gust of wind causing the main rotor to contact the…

## 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 Mark O Treidel AR-1 aircraft: https://openairdocs.org/model/mark-o-treidel-ar-1/aircraft.md
- The Rotax 914UL engine: https://openairdocs.org/engine/rotax-914ul.md

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