# N91AS: 1954 Sikorsky S55B, registration cancelled 2015-05-11

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 11, 2015
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Sikorsky S55B](https://openairdocs.org/model/sikorsky-s55b) (registry code 8141603)
- Engine: [AiResearch TSE331 series](https://openairdocs.org/engine/airesearch-tse331-series) (registry code 01505)
- Data sheets: [TCDS 1H4](https://openairdocs.org/tcds/1H4), [TCDS E4WE](https://openairdocs.org/tcds/E4WE) (OpenAirDocs)
- Serial number: 55646
- Year built: 1954
- Type of aircraft: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard
- Certificate issued: January 31, 1986
- Last registry action: December 18, 2007
- Mode S code: AC9463
- Owner when cancelled: [Westec Air Inc](https://openairdocs.org/faa-owner/WESTEC%20AIR%20INC)
- Location: [Mesa, AZ](https://openairdocs.org/faa-place/AZ/Mesa)
- Owner type: Corporation
- Owner's area on the map: 33.4332° N, 111.7136° W: Placed by OpenAirDocs at the center of ZIP code 85205, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N91AS
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=91AS
- Page: https://openairdocs.org/deregistered/N91AS-2015-05-11

From the FAA registry file of October 28, 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 S55B: https://openairdocs.org/model/sikorsky-s55b.md

## Other aircraft with N91AS

- [Registered now](https://openairdocs.org/aircraft/N91AS): Diamond Aircraft Ind DA20-C1, S/N C0443, built 2007

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