| Tail Number / N-Number | N121MK |
| Manufacturer | KIEDROWSKI MARK A |
| Model | PANTHER TRI-GEAR |
| Manufacturer's Serial Number | 121 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Kit Manufacturer | SPORT PERFORMANCE AVIATION LLC |
| Kit Model | PANTHER TRI-GEAR |
| Type of Registrant | Individual |
| Owner Name | KIEDROWSKI MARK A |
| Street | 4035 BEE CREEK RD |
| City | SPICEWOOD |
| State | TX |
| Zip Code | 78669-6777 |
| Region | Southwestern |
| County | Burnet County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2023-01-05 |
| Last Action Date | 2023-01-05 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 50054206 |
| Mode S Code Hex | A05886 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N121MK.
| Tail Number / N-Number | N121MK |
| Manufacturer | MEIER/KOHM |
| Model | PIETENPOL AIR-SCOUT |
| Manufacturer's Serial Number | WA12121 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Partnership |
| Owner Name | MEIER ROBERT H |
| Other Names |
|
| Street | 11 ROBIN LANE |
| City | FENTON |
| State | MO |
| Zip Code | 63026 |
| County | Burnet County |
| Country | US |
| Certificate Issue Date | 1985-01-22 |
| Last Action Date | 2009-01-20 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2015-05-19 |