# N121MK: Kiedrowski Mark A PANTHER TRI-GEAR

- Status: Valid registration
- Airframe: [Kiedrowski Mark A PANTHER TRI-GEAR](https://openairdocs.org/model/kiedrowski-mark-a-panther-tri-gear) (registry code 05641HS, 1 seats)
- Serial number: 121
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Sport Performance Aviation LLC PANTHER TRI-GEAR
- Certificate issued: January 5, 2023
- Expires: January 31, 2030
- Mode S code: A05886
- Registered owner: [Kiedrowski Mark A](https://openairdocs.org/faa-owner/KIEDROWSKI%20MARK%20A)
- Location: [Spicewood, TX](https://openairdocs.org/faa-place/TX/Spicewood)
- Owner type: Individual
- Owner's area on the map: 30.4425° N, 98.1234° W: Placed by OpenAirDocs at the center of ZIP code 78669, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=121MK
- Page: https://openairdocs.org/aircraft/N121MK

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 (Kiedrowski Mark A PANTHER TRI-GEAR)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N121MK.

## FAA accident and incident reports

None matched to N121MK.

## 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.

## Earlier aircraft with N121MK

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N121MK before.

- [Cancelled 2015-05-19](https://openairdocs.org/deregistered/N121MK-2015-05-19): Meier/Kohm PIETENPOL AIR-SCOUT, S/N WA12121. Registration expired, pending cancellation. Owner: [Meier Robert H](https://openairdocs.org/faa-owner/MEIER%20ROBERT%20H), [Fenton, MO](https://openairdocs.org/faa-place/MO/Fenton)

## Related

- Other Kiedrowski Mark A PANTHER TRI-GEAR aircraft: https://openairdocs.org/model/kiedrowski-mark-a-panther-tri-gear/aircraft.md

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