# N521M: not currently registered

- Registered now: No (not in the FAA registry file). The mark may be reserved or free to assign
- Earlier aircraft: 3
- Last cancelled: March 24, 2017
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=521M
- Page: https://openairdocs.org/aircraft/N521M

## Aircraft that carried N521M

- [Cancelled 2017-03-24](https://openairdocs.org/deregistered/N521M-2017-03-24): Aeros AEROS-2, S/N 104, built 2006. Registration expired, pending cancellation. Owner: [Molina Angel H](https://openairdocs.org/faa-owner/MOLINA%20ANGEL%20H), [Rio Rico, AZ](https://openairdocs.org/faa-place/AZ/Rio%20Rico)
- [Cancelled 1973-02-23](https://openairdocs.org/deregistered/N521M-1973-02-23): Hawker Siddeley DH.125-3A/522, S/N 25129. Owner: [Marathon Oil Company](https://openairdocs.org/faa-owner/MARATHON%20OIL%20COMPANY), [Findlay, OH](https://openairdocs.org/faa-place/OH/Findlay)
- [Cancelled (date not recorded)](https://openairdocs.org/deregistered/N521M-undated): Brunner-Winkle BIRD A, S/N 1047. Owner: [Kimball Aircraft Corp](https://openairdocs.org/faa-owner/KIMBALL%20AIRCRAFT%20CORP)

## NTSB investigations on N521M (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 CHI73AC057](https://openairdocs.org/ntsb/CHI73AC057), Dec 12, 1972: Hawker-Sdly DH125 (N521M), Findlay, OH, destroyed

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