# N20M: Learjet 23, registration cancelled 1973-05-29

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 29, 1973
- Status when cancelled: Valid registration
- Airframe: [Learjet 23](https://openairdocs.org/model/learjet-23) (registry code 5170102)
- Data sheets: [TCDS A5CE](https://openairdocs.org/tcds/A5CE) (OpenAirDocs)
- Serial number: 094
- Type of aircraft: Fixed wing multi engine
- Certificate issued: September 30, 1971
- Mode S code: A190BD
- Owner when cancelled: [Zantop Howard W](https://openairdocs.org/faa-owner/ZANTOP%20HOWARD%20W)
- Location: [Lauderdale, FL](https://openairdocs.org/faa-place/FL/Lauderdale)
- Owner type: Individual
- The mark today: https://openairdocs.org/aircraft/N20M
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=20M
- Page: https://openairdocs.org/deregistered/N20M-1973-05-29

From the FAA registry file of October 29, 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 Learjet 23: https://openairdocs.org/model/learjet-23.md

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CHI73AC058](https://openairdocs.org/ntsb/CHI73AC058), Dec 15, 1972: Lear 23 (N20M), Romulus, MI, destroyed, 2 fatal

## Other aircraft with N20M

- [Registered now](https://openairdocs.org/aircraft/N20M): Beech-Parks BEECH-PARKS D-45, S/N BG-204, built 1983

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