| Tail Number / N-Number | N591K |
| Manufacturer | PIPER |
| Model | J3L-65 |
| Year Built | 1940 |
| Manufacturer's Serial Number | 5560 |
| 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 | CONT MOTOR |
| Engine Model | C90 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 95 hp (71 kW) |
| Average Cruising Speed | 67 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | JACK BROWN SEAPLANE BASE INC |
| Street | 2704 US HIGHWAY 92 |
| City | WINTER HAVEN |
| State | FL |
| Zip Code | 33881-9157 |
| Region | Southern |
| County | Polk County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1998-03-16 |
| Certificate Issue Date | 2003-12-18 |
| Last Action Date | 2021-08-16 |
| Expiration Date | 2029-01-31 |
| Status | Valid Registration |
| Mode S Code | 51720777 |
| Mode S Code Hex | A7A1FF |