# N4145A: 1956 Sikorsky S-51, registration cancelled 1974-01-14

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: January 14, 1974
- Status when cancelled: Valid registration
- Airframe: [Sikorsky S-51](https://openairdocs.org/model/sikorsky-s-51) (registry code 8141102)
- Data sheets: [TCDS H-2](https://openairdocs.org/tcds/H-2) (OpenAirDocs)
- Serial number: 5154
- Year built: 1956
- Type of aircraft: Rotorcraft
- Certificate issued: January 7, 1957
- Mode S code: A4E604
- Owner when cancelled: [Ming-Ayer Inc](https://openairdocs.org/faa-owner/MING-AYER%20INC)
- Location: [Linden, NJ](https://openairdocs.org/faa-place/NJ/Linden)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N4145A
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4145A
- Page: https://openairdocs.org/deregistered/N4145A-1974-01-14

From the FAA registry file of November 7, 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-51: https://openairdocs.org/model/sikorsky-s-51.md

## Other aircraft with N4145A

- [Registered now](https://openairdocs.org/aircraft/N4145A): Piper PA-28-181, S/N 2843150, built 1998

---
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.