# N331SD: not currently registered

- Registered now: No (not in the FAA registry file). The mark may be reserved or free to assign
- Earlier aircraft: 1
- Last cancelled: February 5, 2022
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=331SD
- Page: https://openairdocs.org/aircraft/N331SD

## Aircraft that carried N331SD

- [Cancelled 2022-02-05](https://openairdocs.org/deregistered/N331SD-2022-02-05): Schweizer TH55A/269A, S/N 291105, built 1969. Registration expired, pending cancellation. Owner: [La Paz County Sheriffs Dept](https://openairdocs.org/faa-owner/LA%20PAZ%20COUNTY%20SHERIFFS%20DEPT), [Parker, AZ](https://openairdocs.org/faa-place/AZ/Parker)

## NTSB investigations on N331SD (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 LAX00TA355](https://openairdocs.org/ntsb/LAX00TA355), Sep 29, 2000: Hughes TH-55A (N331SD), Phoenix, AZ, substantial damage. Probable cause: the flight instructor's misjudged flare during a simulated autorotation, which led to a hard landing.

## FAA accident and incident reports on N331SD (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 20000929014739A](https://openairdocs.org/incident/20000929014739A), Sep 29, 2000: Hughes TH55A (N331SD), Phoenix, AZ, No damage. (-23) The second pilot said PIC landed the a/c hard and he thought that is what caused the main rotor blade to strike the tail boom. Attached info.

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