# N455Z: 1955 Sikorsky S-55B, registration cancelled 1977-07-07

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: July 7, 1977
- Status when cancelled: Valid registration
- Airframe: [Sikorsky S-55B](https://openairdocs.org/model/sikorsky-s-55b) (registry code 8141604)
- Data sheets: [TCDS 1H4](https://openairdocs.org/tcds/1H4) (OpenAirDocs)
- Serial number: 55-577
- Year built: 1955
- Type of aircraft: Rotorcraft
- Certificate issued: August 14, 1967
- Mode S code: A586EE
- Owner when cancelled: [Aircraft Specialities Inc](https://openairdocs.org/faa-owner/AIRCRAFT%20SPECIALITIES%20INC)
- Location: [Mesa, AZ](https://openairdocs.org/faa-place/AZ/Mesa)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N455Z
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=455Z
- Page: https://openairdocs.org/deregistered/N455Z-1977-07-07

From the FAA registry file of October 29, 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-55B: https://openairdocs.org/model/sikorsky-s-55b.md

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB ANC71AA018](https://openairdocs.org/ntsb/ANC71AA018), Aug 26, 1970: Sikorsky S-55B (N455Z), Valdez, AK, 1 fatal

## Other aircraft with N455Z

- [Registered now](https://openairdocs.org/aircraft/N455Z): Gulfstream Aerospace G-IV, S/N 1235, built 1994

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