| Tail Number / N-Number | N66JS |
| Manufacturer | SPEAR |
| Model | PITTS |
| Year Built | 1973 |
| Manufacturer's Serial Number | JS66 |
| 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 | O&VO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Average Cruising Speed | 108 miles per hour |
| Type of Registrant | Individual |
| Owner Name | SPEAR GERALD E JR |
| Street | 20 CRESTWOOD LANE |
| City | CENTRALIA |
| State | IL |
| Zip Code | 62801 |
| Region | Great Lakes |
| County | Marion County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1980-02-21 |
| Certificate Issue Date | 1973-06-01 |
| Last Action Date | 2020-05-12 |
| Expiration Date | 2027-10-31 |
| Status | Valid Registration |
| Mode S Code | 52131271 |
| Mode S Code Hex | A8B2B9 |