# N20K: not currently registered

- Registered now: No (not in the FAA registry file). The mark may be reserved or free to assign
- Earlier aircraft: 4
- Last cancelled: October 12, 2005
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=20K
- Page: https://openairdocs.org/aircraft/N20K

## Aircraft that carried N20K

- [Cancelled 2005-10-12](https://openairdocs.org/deregistered/N20K-2005-10-12): Aero Commander 1121B, S/N 144, built 1974. Owner: [White Industries Inc](https://openairdocs.org/faa-owner/WHITE%20INDUSTRIES%20INC), [Bates City, MO](https://openairdocs.org/faa-place/MO/Bates%20City)
- [Cancelled 1990-10-01](https://openairdocs.org/deregistered/N20K-1990-10-01): Robinson Helicopter R22 BETA, S/N 789. N-number assigned, not yet registered
- [Cancelled 1976-10-22](https://openairdocs.org/deregistered/N20K-1976-10-22): Urshan UR-1, S/N 1, built 1954. Owner: [Urshan Samuel A](https://openairdocs.org/faa-owner/URSHAN%20SAMUEL%20A), [San Diego, CA](https://openairdocs.org/faa-place/CA/San%20Diego)
- [Cancelled 1937-09-30](https://openairdocs.org/deregistered/N20K-1937-09-30): Savoia Marchetti S-55-P, S/N 10517, built 1929. Owner: [Alaska Airways Inc](https://openairdocs.org/faa-owner/ALASKA%20AIRWAYS%20INC), [Seattle, WA](https://openairdocs.org/faa-place/WA/Seattle)

## NTSB investigations on N20K (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 FTW90GA146](https://openairdocs.org/ntsb/FTW90GA146), Jul 26, 1990: Robinson R22B (N20K), Tahlequah, OK, destroyed, 1 fatal. Probable cause: THE PILOT'S FAILURE TO MAINTAIN ADEQUATE ALTITUDE.

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