# N173K: Monocoupe 90, registration cancelled 1948-02-03

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: February 3, 1948
- Status when cancelled: Valid registration
- Airframe: [Monocoupe 90](https://openairdocs.org/model/monocoupe-90) (registry code 5810102)
- Data sheets: [TCDS A-306](https://openairdocs.org/tcds/A-306) (OpenAirDocs)
- Serial number: 507
- Type of aircraft: Fixed wing single engine
- Mode S code: A12533
- Owner when cancelled: [Williams Robert E Jr](https://openairdocs.org/faa-owner/WILLIAMS%20ROBERT%20E%20JR)
- Owner type: Individual
- The mark today: https://openairdocs.org/aircraft/N173K
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=173K
- Page: https://openairdocs.org/deregistered/N173K-1948-02-03

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 Monocoupe 90: https://openairdocs.org/model/monocoupe-90.md

## Other aircraft with N173K

- [Registered now](https://openairdocs.org/aircraft/N173K): Helio H-391B, S/N 074

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