# N12K: 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: September 3, 2014
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=12K
- Page: https://openairdocs.org/aircraft/N12K

## Aircraft that carried N12K

- [Cancelled 2014-09-03](https://openairdocs.org/deregistered/N12K-2014-09-03): Sierra S-1, S/N 1, built 1953. Registration expired, pending cancellation. Owner: [Sierradyne Inc](https://openairdocs.org/faa-owner/SIERRADYNE%20INC), [Los Angeles, CA](https://openairdocs.org/faa-place/CA/Los%20Angeles)

## NTSB investigations on N12K (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 DIA68D0123](https://openairdocs.org/ntsb/DIA68D0123), Nov 24, 1967: Sierradyne S-1 (N12K), Langley Afb, VA, substantial damage

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