# N77YD: 2018 Tharon V Judd CHALLENGER II, registration cancelled 2022-11-05

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: November 5, 2022
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Tharon V Judd CHALLENGER II](https://openairdocs.org/model/tharon-v-judd-challenger-ii) (registry code 05637VK)
- Engine: [Rotax 503 series](https://openairdocs.org/engine/rotax-503-series) (registry code 55564)
- Serial number: CH2-0904-2531
- Year built: 2018
- Type of aircraft: Fixed wing single engine
- Engine type: 2 cycle
- Kit: Quad City Ultralight Acft Corp CHALLENGER II
- Airworthiness: Experimental, amateur built
- Airworthiness date: July 19, 2018
- Certificate issued: July 17, 2019
- Last registry action: July 17, 2019
- Mode S code: AA68D8
- Owner when cancelled: [Roberts Derek J](https://openairdocs.org/faa-owner/ROBERTS%20DEREK%20J)
- Location: [Lehi, UT](https://openairdocs.org/faa-place/UT/Lehi)
- Owner type: Individual
- Owner's area on the map: 40.4116° N, 111.8743° W: Placed by OpenAirDocs at the center of ZIP code 84043, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N77YD
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=77YD
- Page: https://openairdocs.org/deregistered/N77YD-2022-11-05

From the FAA registry file of November 5, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Tharon V Judd CHALLENGER II: https://openairdocs.org/model/tharon-v-judd-challenger-ii.md

## 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 WPR19LA192](https://openairdocs.org/ntsb/WPR19LA192), Jul 19, 2019: Judd Challenger II (N77YD), Draper, UT, substantial damage. Probable cause: The total loss of engine power for reasons that could not be determined based on available evidence.

## 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 20190718015299A](https://openairdocs.org/incident/20190718015299A), Jul 18, 2019: Tharon V Judd CHALLENGER II (N77YD), Draper, UT, Substantial damage. Engine sudden stoppage. Pilot guided aircraft to a road without power lines or obstructions. Aligned aircraft on center of road but drifted into tree branch…

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