| Tail Number / N-Number | N521DK |
| Manufacturer | KOSHINSKI DAVID A |
| Model | AVENTURA HP |
| Year Built | 1999 |
| Manufacturer's Serial Number | APHP0015 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Light Sport |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | 503 DCDI |
| Engine Type | 2 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 52 hp (39 kW) |
| Type of Registrant | LLC |
| Owner Name | SIGNMAXX LLC |
| Street | 812 E MAIN ST |
| City | LARKSVILLE |
| State | PA |
| Zip Code | 18651 |
| Region | Eastern |
| County | Luzerne County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2007-07-17 |
| Certificate Issue Date | 2019-04-18 |
| Last Action Date | 2021-12-08 |
| Expiration Date | 2029-04-30 |
| Status | Valid Registration |
| Mode S Code | 51506372 |
| Mode S Code Hex | A68CFA |