# N121M: Boeing B75N1, registration cancelled 1973-12-06

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: December 6, 1973
- Status when cancelled: Valid registration
- Airframe: [Boeing B75N1](https://openairdocs.org/model/boeing-b75n1) (registry code 1380144)
- Data sheets: [TCDS A-743](https://openairdocs.org/tcds/A-743) (OpenAirDocs)
- Serial number: 75-7894
- Type of aircraft: Fixed wing single engine
- Certificate issued: September 8, 1949
- Mode S code: A0587C
- Owner when cancelled: [Curtis L Mardock](https://openairdocs.org/faa-owner/CURTIS%20L%20MARDOCK)
- Location: [Spring Hill, KS](https://openairdocs.org/faa-place/KS/Spring%20Hill)
- Owner type: Individual
- The mark today: https://openairdocs.org/aircraft/N121M
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=121M
- Page: https://openairdocs.org/deregistered/N121M-1973-12-06

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 Boeing B75N1: https://openairdocs.org/model/boeing-b75n1.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 MKC74AK019](https://openairdocs.org/ntsb/MKC74AK019), Oct 21, 1973: Boeing B75N1 (N121M), Spring Hill, KS, destroyed, 1 fatal

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 19731021033669A](https://openairdocs.org/incident/19731021033669A), Oct 21, 1973: Boeing N2S3 (N121M), Spring Hill, KS, Destroyed. Lost ctl in low pass over friends house. Plt flew 1 hr in last 90 days.

## Other aircraft with N121M

- [Registered now](https://openairdocs.org/aircraft/N121M): Cessna 182Q, S/N 18265624, built 1977
- [Cancelled 1934-10-12](https://openairdocs.org/deregistered/N121M-1934-10-12): North American SUPER UNIVERSAL, S/N 862, built 1929. Exported to Mexico. Owner: [Williams Lee](https://openairdocs.org/faa-owner/WILLIAMS%20LEE), [Burbank, CA](https://openairdocs.org/faa-place/CA/Burbank)

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