# N4221S: 1976 Sikorsky S-61A, registration cancelled 1977-01-18

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: January 18, 1977
- Exported to: Malaysia
- Status when cancelled: Valid registration
- Airframe: [Sikorsky S-61A](https://openairdocs.org/model/sikorsky-s-61a) (registry code 814210C)
- Data sheets: [TCDS H2EA](https://openairdocs.org/tcds/H2EA) (OpenAirDocs)
- Serial number: 61780
- Year built: 1976
- Type of aircraft: Rotorcraft
- Certificate issued: November 4, 1976
- Mode S code: A50599
- Owner when cancelled: [United Technologies Corp](https://openairdocs.org/faa-owner/UNITED%20TECHNOLOGIES%20CORP)
- Location: [Stratford, CT](https://openairdocs.org/faa-place/CT/Stratford)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N4221S
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4221S
- Page: https://openairdocs.org/deregistered/N4221S-1977-01-18

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-61A: https://openairdocs.org/model/sikorsky-s-61a.md

## Other aircraft with N4221S

- [Registered now](https://openairdocs.org/aircraft/N4221S): Air Tractor AT-802A, S/N 802A-0305, built 2008

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