# N4120K: Knight TWISTER, registration cancelled 1956-02-14

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: February 14, 1956
- Status when cancelled: Valid registration
- Airframe: [Knight TWISTER](https://openairdocs.org/model/knight-twister) (registry code 4970115)
- Serial number: W-1
- Type of aircraft: Fixed wing single engine
- Certificate issued: April 26, 1950
- Mode S code: A4DDF0
- Owner when cancelled: [Wollgast Arthur F](https://openairdocs.org/faa-owner/WOLLGAST%20ARTHUR%20F)
- Location: [San Diego, CA](https://openairdocs.org/faa-place/CA/San%20Diego)
- Owner type: Individual
- The mark today: https://openairdocs.org/aircraft/N4120K
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4120K
- Page: https://openairdocs.org/deregistered/N4120K-1956-02-14

From the FAA registry file of November 7, 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 Knight TWISTER: https://openairdocs.org/model/knight-twister.md

## Other aircraft with N4120K

- [Registered now](https://openairdocs.org/aircraft/N4120K): Piper PA-28-181, S/N 2843225, built 1999

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