# N4000: not currently registered

- Registered now: No (not in the FAA registry file). The mark may be reserved or free to assign
- Earlier aircraft: 1
- Last cancelled: July 21, 1928
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4000
- Page: https://openairdocs.org/aircraft/N4000

## Aircraft that carried N4000

- [Cancelled 1928-07-21](https://openairdocs.org/deregistered/N4000-1928-07-21): Berliner CM5W, S/N 1. Owner: [Potomac Flying Service Inc](https://openairdocs.org/faa-owner/POTOMAC%20FLYING%20SERVICE%20INC), [South Washington, VA](https://openairdocs.org/faa-place/VA/South%20Washington)

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