| Tail Number / N-Number | N873SP |
| Manufacturer | LYNCH JOHN R |
| Model | RV-4 |
| Year Built | 1991 |
| Manufacturer's Serial Number | 873 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| 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) |
| Type of Registrant | Individual |
| Owner Name | LYNCH JOHN R |
| Street | PO BOX 721 |
| City | SANTA PAULA |
| State | CA |
| Zip Code | 93061 |
| Region | Western-Pacific |
| County | Ventura County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1992-01-31 |
| Certificate Issue Date | 1991-12-02 |
| Last Action Date | 2021-08-13 |
| Expiration Date | 2029-01-31 |
| Status | Valid Registration |
| Mode S Code | 53001431 |
| Mode S Code Hex | AC0319 |