# N421MM: 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: March 17, 2021
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=421MM
- Page: https://openairdocs.org/aircraft/N421MM

## Aircraft that carried N421MM

- [Cancelled 2021-03-17](https://openairdocs.org/deregistered/N421MM-2021-03-17): Cessna 421B, S/N 421B0804, built 1974. Registration expired. Owner: [Hat Investments LLC](https://openairdocs.org/faa-owner/HAT%20INVESTMENTS%20LLC), [Spartanburg, SC](https://openairdocs.org/faa-place/SC/Spartanburg)

## NTSB investigations on N421MM (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 ERA18WA159](https://openairdocs.org/ntsb/ERA18WA159), Jun 5, 2018: Cessna 421B (N421MM), Rock Sound, Bahamas, destroyed, 3 fatal

## FAA accident and incident reports on N421MM (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Incident 19930817037219I](https://openairdocs.org/incident/19930817037219I), Aug 17, 1993: Cessna 421B (N421MM), East Hampton, NY, Minor damage. On liftoff, nose gear hit a deer. Continued to newark. Nose gear collapsed on landing rollout.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.