# N4122D: Helio H-391B, registration cancelled 1957-04-16

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 16, 1957
- Exported to: Brazil
- Status when cancelled: Valid registration
- Airframe: [Helio H-391B](https://openairdocs.org/model/helio-h-391b) (registry code 4300106)
- Data sheets: [TCDS 1A8](https://openairdocs.org/tcds/1A8) (OpenAirDocs)
- Serial number: 047
- Type of aircraft: Fixed wing single engine
- Mode S code: A4DE30
- Owner when cancelled: [Helio Aircraft Corp](https://openairdocs.org/faa-owner/HELIO%20AIRCRAFT%20CORP)
- Location: [Pittsburg, KS](https://openairdocs.org/faa-place/KS/Pittsburg)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N4122D
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4122D
- Page: https://openairdocs.org/deregistered/N4122D-1957-04-16

From the FAA registry file of November 5, 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 Helio H-391B: https://openairdocs.org/model/helio-h-391b.md

## Other aircraft with N4122D

- [Registered now](https://openairdocs.org/aircraft/N4122D): Piper PA-28-181, S/N 2843130, built 1998

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