# N591AK: 1989 Sikorsky S-76B, registration cancelled 2022-12-31

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: December 31, 2022
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Sikorsky S-76B](https://openairdocs.org/model/sikorsky-s-76b) (registry code 8143007)
- Engine: [Pratt & Whitney Canada PT6B-36A](https://openairdocs.org/engine/pratt-whitney-canada-pt6b-36a) (registry code 52176)
- Data sheets: [TCDS H1NE](https://openairdocs.org/tcds/H1NE), [TCDS E21NE](https://openairdocs.org/tcds/E21NE) (OpenAirDocs)
- Serial number: 760348
- Year built: 1989
- Type of aircraft: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard
- Airworthiness date: April 26, 1989
- Certificate issued: September 18, 2019
- Last registry action: March 29, 2021
- Mode S code: A7A128
- Owner when cancelled: [Unical Aviation Inc](https://openairdocs.org/faa-owner/UNICAL%20AVIATION%20INC)
- Location: [Walnut, CA](https://openairdocs.org/faa-place/CA/Walnut)
- Owner type: Corporation
- Owner's area on the map: 34.0182° N, 117.8548° W: Placed by OpenAirDocs at the center of ZIP code 91789, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N591AK
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=591AK
- Page: https://openairdocs.org/deregistered/N591AK-2022-12-31

From the FAA registry file of November 5, 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 Sikorsky S-76B: https://openairdocs.org/model/sikorsky-s-76b.md

## FAA accident and incident reports (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 20140206023569I](https://openairdocs.org/incident/20140206023569I), Feb 6, 2014: Sikorsky S-76B (N591AK), New York, NY, Minor damage. Pilot reports that he had to adjust his approach path due to snow bank and patchy ice at the normal touchdown location. Landing was uneventful. During ground…

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