| Tail Number / N-Number | N421MK |
| Manufacturer | KEPPEL MERRITT |
| Model | GT500 |
| Manufacturer's Serial Number | 0163 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | KEPPEL MERRITT TA |
| Other Names |
|
| Street | 1301 MILL QUARTER RD |
| City | FORD |
| State | VA |
| Zip Code | 23850-2810 |
| Region | Eastern |
| County | Amelia County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 1993-09-02 |
| Last Action Date | 2021-06-11 |
| Expiration Date | 2028-09-30 |
| Status | Valid Registration |
| Mode S Code | 51200163 |
| Mode S Code Hex | A50073 |