# N7507: 1953 Sikorsky S-55, registration cancelled 2013-05-08

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 8, 2013
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Sikorsky S-55](https://openairdocs.org/model/sikorsky-s-55) (registry code 8141602)
- Engine: [Wright C7BA series](https://openairdocs.org/engine/wright-c7ba-series) (registry code 67017)
- Data sheets: [TCDS 1H4](https://openairdocs.org/tcds/1H4) (OpenAirDocs)
- Serial number: SA55-563
- Year built: 1953
- Type of aircraft: Rotorcraft
- Engine type: Reciprocating
- Airworthiness: Restricted, agriculture and pest control, other, aerial surveying, patrolling, aerial advertising
- Airworthiness date: August 31, 1976
- Certificate issued: October 17, 1977
- Last registry action: July 27, 2006
- Mode S code: AA1D56
- Owner when cancelled: [Heliambulance Service Corp](https://openairdocs.org/faa-owner/HELIAMBULANCE%20SERVICE%20CORP)
- Location: Santurce, PR, RQ
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N7507
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=7507
- Page: https://openairdocs.org/deregistered/N7507-2013-05-08

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

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