| Tail Number / N-Number | N931S |
| Manufacturer | HUDSON RALPH ARTHUR |
| Model | STROJNIK S2 |
| Year Built | 2006 |
| Manufacturer's Serial Number | 2222 |
| 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 | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 1 engine |
| Type of Registrant | Corporation |
| Owner Name | CENTRAL WASHINGTON SOARING |
| Street | 2004 W WASHINGTON AVE |
| City | YAKIMA |
| State | WA |
| Zip Code | 98903-1240 |
| Region | Northwest Mountain |
| County | Yakima County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2006-06-28 |
| Certificate Issue Date | 2007-11-27 |
| Last Action Date | 2021-06-29 |
| Expiration Date | 2028-11-30 |
| Status | Valid Registration |
| Mode S Code | 53165360 |
| Mode S Code Hex | ACEAF0 |