# N423A: Sikorsky S-55, registration cancelled 1957-07-02

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: July 2, 1957
- Exported to: Canada
- Status when cancelled: Valid registration
- Airframe: [Sikorsky S-55](https://openairdocs.org/model/sikorsky-s-55) (registry code 8141602)
- Data sheets: [TCDS 1H4](https://openairdocs.org/tcds/1H4) (OpenAirDocs)
- Serial number: 55561
- Type of aircraft: Rotorcraft
- Certificate issued: August 8, 1955
- Mode S code: A506C4
- Owner when cancelled: [Petroleum Helicopters Inc](https://openairdocs.org/faa-owner/PETROLEUM%20HELICOPTERS%20INC)
- Location: [New Orleans, LA](https://openairdocs.org/faa-place/LA/New%20Orleans)
- Owner type: Corporation
- Owner's area on the map: 29.9546° N, 90.0751° W: Placed by OpenAirDocs: center of New Orleans, LA, within about 7 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N423A
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=423A
- Page: https://openairdocs.org/deregistered/N423A-1957-07-02

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-55: https://openairdocs.org/model/sikorsky-s-55.md

## Other aircraft with N423A

- [Cancelled 2024-07-06](https://openairdocs.org/deregistered/N423A-2024-07-06): Allen John W ZENITH STOL CH-701, S/N 7-7187, built 2009. Registration pending, canceled. Owner: [Mason, TX](https://openairdocs.org/faa-place/TX/Mason)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.