# N842: Delackner Helicopters DH4, registration cancelled 1957-05-06

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 6, 1957
- Status when cancelled: Valid registration
- Airframe: [Delackner Helicopters DH4](https://openairdocs.org/model/delackner-helicopters-dh4) (registry code 2850202)
- Serial number: DH-4-4
- Type of aircraft: Rotorcraft
- Certificate issued: June 27, 1956
- Mode S code: AB8746
- Owner when cancelled: [De Lackner Helicopters Inc](https://openairdocs.org/faa-owner/DE%20LACKNER%20HELICOPTERS%20INC)
- Location: [Mount Vernon, NY](https://openairdocs.org/faa-place/NY/Mount%20Vernon)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N842
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=842
- Page: https://openairdocs.org/deregistered/N842-1957-05-06

From the FAA registry file of November 4, 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 Delackner Helicopters DH4: https://openairdocs.org/model/delackner-helicopters-dh4.md

## Other aircraft with N842

- [Registered now](https://openairdocs.org/aircraft/N842): Newton SMITH MINIPLANE, S/N 002
- [Cancelled 1956-02-17](https://openairdocs.org/deregistered/N842-1956-02-17): Lockheed ELECTRA 10-A, S/N 1030. Owner: [Cordova Air Services Inc](https://openairdocs.org/faa-owner/CORDOVA%20AIR%20SERVICES%20INC), [Cordova, AK](https://openairdocs.org/faa-place/AK/Cordova)
- [Cancelled 1933-02-14](https://openairdocs.org/deregistered/N842-1933-02-14): Standard J-1, S/N 842-A SUB. Owner: [Rosenberger Roy](https://openairdocs.org/faa-owner/ROSENBERGER%20ROY), [Houston, TX](https://openairdocs.org/faa-place/TX/Houston)

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