| Tail Number / N-Number | N21DJ |
| Manufacturer | KOVACH KIM A |
| Model | PITTS S1S |
| Year Built | 1992 |
| Manufacturer's Serial Number | 289 |
| 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) |
| Engine Manufacturer | LYCOMING |
| Engine Model | I0360 SER A&C |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 200 hp (149 kW) |
| Type of Registrant | Corporation |
| Owner Name | ATTITUDE TOYS LLC |
| Street | 3511 SILVERSIDE RD STE 105 |
| City | WILMINGTON |
| State | DE |
| Zip Code | 19810-4902 |
| Region | Eastern |
| County | New Castle County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1992-07-23 |
| Certificate Issue Date | 2013-07-15 |
| Last Action Date | 2022-03-01 |
| Expiration Date | 2029-07-31 |
| Status | Valid Registration |
| Mode S Code | 50333575 |
| Mode S Code Hex | A1B77D |