# N5999M: 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: April 4, 1989
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=5999M
- Page: https://openairdocs.org/aircraft/N5999M

## Aircraft that carried N5999M

- [Cancelled 1989-04-04](https://openairdocs.org/deregistered/N5999M-1989-04-04): Cessna 421B, S/N 421B0242. N-number assigned, not yet registered

## NTSB investigations on N5999M (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 FTW89LA062](https://openairdocs.org/ntsb/FTW89LA062), Mar 3, 1989: Cessna 421B (N5999M), San Antonio, TX, destroyed. Probable cause: THE FAILURE OF THE PILOT TO FOLLOW THE PROPER PROCEDURES/DIRECTIVES BY NOT FOLLOWING THE GLIDESLOPE WHICH RESULTED IN NOT BEING ABLE TO ATTAIN THE PROPER TOUCHDOWN POINT.

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