# N4643S: 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: July 20, 1993
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4643S
- Page: https://openairdocs.org/aircraft/N4643S

## Aircraft that carried N4643S

- [Cancelled 1993-07-20](https://openairdocs.org/deregistered/N4643S-1993-07-20): Sikorsky S-52-3, S/N 125521. Exported to United Kingdom. Owner: [Vertical Aviation Technologies Inc](https://openairdocs.org/faa-owner/VERTICAL%20AVIATION%20TECHNOLOGIES%20INC), [Sanford, FL](https://openairdocs.org/faa-place/FL/Sanford)

## NTSB investigations on N4643S (2)

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 MIA78FLD32](https://openairdocs.org/ntsb/MIA78FLD32), Apr 4, 1978: Sikorsky S-52-3 (N4643S), Eustis, FL, substantial damage
- [NTSB UNK69X0108](https://openairdocs.org/ntsb/UNK69X0108), Feb 3, 1969: Sikorsky S-52-3 (N4643S), Santo Domingo (Atlantic Ocean), substantial damage

## FAA accident and incident reports on N4643S (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.

- [Accident 19780404006989A](https://openairdocs.org/incident/19780404006989A), Apr 4, 1978: Skrsky S523 (N4643S), Eustis, FL, Substantial damage. Connecting rod cap bolt failed in center left cylinder. Piston rinad not fully seated.

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