# N521HB: 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: March 4, 2023
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=521HB
- Page: https://openairdocs.org/aircraft/N521HB

## Aircraft that carried N521HB

- [Cancelled 2023-03-04](https://openairdocs.org/deregistered/N521HB-2023-03-04): Mcdonnell Douglas Helicopter 500N, S/N LN084, built 1998. Registration expired, pending cancellation. Owner: [City Of Huntington Beach](https://openairdocs.org/faa-owner/CITY%20OF%20HUNTINGTON%20BEACH), [Huntington Beach, CA](https://openairdocs.org/faa-place/CA/Huntington%20Beach)

## NTSB investigations on N521HB (2)

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 WPR22FA101](https://openairdocs.org/ntsb/WPR22FA101), Feb 20, 2022: Mcdonnell Douglas 500N (N521HB), Newport Beach, CA, substantial damage, 1 fatal. Probable cause: The helicopter’s encounter with unanticipated right yaw during a low-altitude, low-airspeed, tight-radius orbit. Contributing to the accident was the pilot’s distraction during the orbit, which…
- [NTSB WPR10TA025](https://openairdocs.org/ntsb/WPR10TA025), Oct 16, 2009: Mcdonnell Douglas Helicopter 500N (N521HB), Los Alamitos, CA, substantial damage. Probable cause: The flight instructor's delayed remedial action during the instructional autorotative landing, which resulted in a failure to maintain an adequate rotor rpm to avoid a hard landing.

## FAA accident and incident reports on N521HB (2)

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 20220219001009A](https://openairdocs.org/incident/20220219001009A), Feb 19, 2022: Mcdonnell Douglas Helicopter 500N (N521HB), Newport Beach, CA, Substantial damage, 1 fatal. On 02/19/2022, approximately 18:30 pacific standard time, huntington Beach police helicopter, MD500N, N521HB, operating as a public aircraft, responded to a…
- [Accident 20091016053579A](https://openairdocs.org/incident/20091016053579A), Oct 16, 2009: Mcdonnell D 500N (N521HB), Los Alamitos, CA, Substantial damage. During my interview with the pilot, he stated that they were about one hour into the training flight when he decided to demonstrate a power recovery…

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