# N5999M: Cessna 421B, registration cancelled 1989-04-04

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 4, 1989
- Status when cancelled: N-number assigned, not yet registered
- Airframe: [Cessna 421B](https://openairdocs.org/model/cessna-421b) (registry code 2076014)
- Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE) (OpenAirDocs)
- Serial number: 421B0242
- Type of aircraft: Fixed wing multi engine
- Mode S code: A7C275
- The mark today: https://openairdocs.org/aircraft/N5999M
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=5999M
- Page: https://openairdocs.org/deregistered/N5999M-1989-04-04

From the FAA registry file of November 7, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Cessna 421B: https://openairdocs.org/model/cessna-421b.md

## NTSB investigations (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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