# N31206: 1947 Commonwealth 185, registration cancelled 2018-03-01

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: March 1, 2018
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Commonwealth 185](https://openairdocs.org/model/commonwealth-185) (registry code 2370608)
- Engine: [Continental C85 series](https://openairdocs.org/engine/continental-c85-series) (registry code 17008)
- Data sheets: [TCDS A-729](https://openairdocs.org/tcds/A-729), [TCDS E-233](https://openairdocs.org/tcds/E-233) (OpenAirDocs)
- Serial number: 1811
- Year built: 1947
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard
- Airworthiness date: July 3, 1958
- Certificate issued: October 13, 1988
- Last registry action: January 14, 2013
- Mode S code: A350B6
- Owner when cancelled: [Kosters Theodore J](https://openairdocs.org/faa-owner/KOSTERS%20THEODORE%20J)
- Location: [Duvall, WA](https://openairdocs.org/faa-place/WA/Duvall)
- Owner type: Individual
- Owner's area on the map: 47.7366° N, 121.9338° W: Placed by OpenAirDocs at the center of ZIP code 98019, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N31206
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=31206
- Page: https://openairdocs.org/deregistered/N31206-2018-03-01

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 Commonwealth 185: https://openairdocs.org/model/commonwealth-185.md

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