# N521AC: 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: December 14, 1983
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=521AC
- Page: https://openairdocs.org/aircraft/N521AC

## Aircraft that carried N521AC

- [Cancelled 1983-12-14](https://openairdocs.org/deregistered/N521AC-1983-12-14): Sikorsky S-76A, S/N 760159. Owner: [Amway Corp](https://openairdocs.org/faa-owner/AMWAY%20CORP), [Ada, MI](https://openairdocs.org/faa-place/MI/Ada)

## NTSB investigations on N521AC (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 CHI83FA428](https://openairdocs.org/ntsb/CHI83FA428), Sep 14, 1983: Sikorsky S-76A (N521AC), Chicago, IL, destroyed

## FAA accident and incident reports on N521AC (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 19830914048899A](https://openairdocs.org/incident/19830914048899A), Sep 14, 1983: Skrsky S76A (N521AC), Chicago, IL, Destroyed. Tail rotor cable routed over instead of under keeper, chafed, broke. Partial yaw control, ditched.

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