| Tail Number / N-Number | N421K |
| Manufacturer | BREWSTER |
| Model | FLEET 2 |
| Manufacturer's Serial Number | 144 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | KINNER |
| Engine Model | K5 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 100 hp (75 kW) |
| Average Cruising Speed | 78 miles per hour |
| Type of Registrant | Individual |
| Owner Name | RAUHAUS HENRY |
| Street | 7877 NEFF RD |
| City | MEDINA |
| State | OH |
| Zip Code | 44256-9484 |
| Region | Great Lakes |
| County | Medina County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1962-08-02 |
| Certificate Issue Date | 2020-05-29 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-05-31 |
| Status | Valid Registration |
| Mode S Code | 51200067 |
| Mode S Code Hex | A50037 |