# N12K: 1953 Sierra S-1, registration cancelled 2014-09-03

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: September 3, 2014
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Sierra S-1](https://openairdocs.org/model/sierra-s-1) (registry code 056010S)
- Engine: [Continental C85 series](https://openairdocs.org/engine/continental-c85-series) (registry code 17008)
- Data sheets: [TCDS E-233](https://openairdocs.org/tcds/E-233) (OpenAirDocs)
- Serial number: 1
- Year built: 1953
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: December 22, 1977
- Certificate issued: February 11, 1974
- Last registry action: May 20, 2008
- Mode S code: A0523A
- Owner when cancelled: [Sierradyne Inc](https://openairdocs.org/faa-owner/SIERRADYNE%20INC)
- Location: [Los Angeles, CA](https://openairdocs.org/faa-place/CA/Los%20Angeles)
- Owner type: Corporation
- Owner's area on the map: 33.9424° N, 118.4161° W: Placed by OpenAirDocs at the center of ZIP code 90045, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N12K
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=12K
- Page: https://openairdocs.org/deregistered/N12K-2014-09-03

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 Sierra S-1: https://openairdocs.org/model/sierra-s-1.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 DIA68D0123](https://openairdocs.org/ntsb/DIA68D0123), Nov 24, 1967: Sierradyne S-1 (N12K), Langley Afb, VA, substantial damage

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