| Tail Number / N-Number | N21JK |
| Manufacturer | AEROTEK |
| Model | PITTS SPECIAL S-1S |
| Year Built | 1974 |
| Manufacturer's Serial Number | 1-0019 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | 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 |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Average Cruising Speed | 115 miles per hour |
| Type of Registrant | Individual |
| Owner Name | KAMINSKI CHARLES D |
| Street | 44651 BEECH AVE |
| City | LANCASTER |
| State | CA |
| Zip Code | 93534-3505 |
| Region | Western-Pacific |
| County | Los Angeles County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1974-07-17 |
| Certificate Issue Date | 1995-09-28 |
| Last Action Date | 2021-05-18 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 50333773 |
| Mode S Code Hex | A1B7FB |