# N4021S: Sikorsky S-61D, registration cancelled 1972-05-23

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 23, 1972
- Exported to: Argentina
- Status when cancelled: Valid registration
- Airframe: [Sikorsky S-61D](https://openairdocs.org/model/sikorsky-s-61d) (registry code 814210L)
- Data sheets: [TCDS H2EA](https://openairdocs.org/tcds/H2EA) (OpenAirDocs)
- Serial number: 61497
- Type of aircraft: Rotorcraft
- Certificate issued: May 1, 1972
- Mode S code: A4B69B
- Owner when cancelled: [Sikorsky Aircraft Division United Aircraft Corp](https://openairdocs.org/faa-owner/SIKORSKY%20AIRCRAFT%20DIVISION%20UNITED%20AIRCRAFT%20CORP)
- Location: [Stratford, CT](https://openairdocs.org/faa-place/CT/Stratford)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N4021S
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4021S
- Page: https://openairdocs.org/deregistered/N4021S-1972-05-23

From the FAA registry file of November 4, 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-61D: https://openairdocs.org/model/sikorsky-s-61d.md

## Other aircraft with N4021S

- [Cancelled 2013-11-08](https://openairdocs.org/deregistered/N4021S-2013-11-08): Ayres S2R-600, S/N 2561R, built 1980. Exported to Guatemala. Owner: [Aircraft Escrow & Title Co](https://openairdocs.org/faa-owner/AIRCRAFT%20ESCROW%20%26%20TITLE%20CO), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington)

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