# N5991X: 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 23, 1966
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=5991X
- Page: https://openairdocs.org/aircraft/N5991X

## Aircraft that carried N5991X

- [Cancelled 1966-02-23](https://openairdocs.org/deregistered/N5991X-1966-02-23): Brantly B-2, S/N 135. Owner: [Ridonlee Copter](https://openairdocs.org/faa-owner/RIDONLEE%20COPTER), [Bigfork, MT](https://openairdocs.org/faa-place/MT/Bigfork)

## NTSB investigations on N5991X (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 SEA66A0030](https://openairdocs.org/ntsb/SEA66A0030), Nov 3, 1965: Brantly B-2 (N5991X), Bigfork, MT, destroyed

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