# N121K: 1972 Keim Midget Mustang M-1

- Status: Valid registration
- Airframe: [Keim Midget Mustang M-1](https://openairdocs.org/model/keim-midget-mustang-m-1) (registry code 16901QT, 1 seats)
- Engine: [Continental IO-200](https://openairdocs.org/engine/continental-io-200) (registry code 17021)
- Serial number: 334
- Year built: 1972
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: May 30, 1980
- Certificate issued: July 4, 2024
- Expires: July 31, 2031
- Mode S code: A0584A
- Registered owner: [Swartzendruber Brett](https://openairdocs.org/faa-owner/SWARTZENDRUBER%20BRETT)
- Location: [Hesston, KS](https://openairdocs.org/faa-place/KS/Hesston)
- Owner type: Individual
- Owner's area on the map: 38.1431° N, 97.4330° W: Placed by OpenAirDocs at the center of ZIP code 67062, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=121K
- Page: https://openairdocs.org/aircraft/N121K

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Keim Midget Mustang M-1)

None in force.

### Matched by engine (Continental IO-200)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N121K.

## FAA accident and incident reports

None matched to N121K.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

- Other Keim Midget Mustang M-1 aircraft: https://openairdocs.org/model/keim-midget-mustang-m-1/aircraft.md
- The Continental IO-200 engine: https://openairdocs.org/engine/continental-io-200.md

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