# N4012S: Krywosa Thomas E CHALLENGER II, registration cancelled 2013-07-08

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: July 8, 2013
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Krywosa Thomas E CHALLENGER II](https://openairdocs.org/model/krywosa-thomas-e-challenger-ii) (registry code 05625M8)
- Serial number: CH203910675
- Type of aircraft: Fixed wing single engine
- Certificate issued: September 28, 1994
- Last registry action: October 20, 2009
- Mode S code: A4B307
- Owner when cancelled: [Krywosa Thomas E](https://openairdocs.org/faa-owner/KRYWOSA%20THOMAS%20E)
- Location: [Boonville, NY](https://openairdocs.org/faa-place/NY/Boonville)
- Owner type: Individual
- Owner's area on the map: 43.4767° N, 75.3430° W: Placed by OpenAirDocs at the center of ZIP code 13309, within about 7 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N4012S
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4012S
- Page: https://openairdocs.org/deregistered/N4012S-2013-07-08

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 Krywosa Thomas E CHALLENGER II: https://openairdocs.org/model/krywosa-thomas-e-challenger-ii.md

## Other aircraft with N4012S

- [Cancelled 1992-02-04](https://openairdocs.org/deregistered/N4012S-1992-02-04): Ayres S2R-T34, S/N 6032. Exported to Spain. Owner: [Ruhe Sales Inc](https://openairdocs.org/faa-owner/RUHE%20SALES%20INC), [Leipsic, OH](https://openairdocs.org/faa-place/OH/Leipsic)
- [Cancelled 1975-05-14](https://openairdocs.org/deregistered/N4012S-1975-05-14): Sikorsky S-65C3, S/N 65398, built 1975. Exported to Israel. Owner: [United Aircraft Corp Sikorsky Aircraft Division](https://openairdocs.org/faa-owner/UNITED%20AIRCRAFT%20CORP%20SIKORSKY%20AIRCRAFT%20DIVISION), [Stratford, CT](https://openairdocs.org/faa-place/CT/Stratford)

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