| Tail Number / N-Number | N186RR |
| Manufacturer | GRENGA ROBERT |
| Model | RV-4 |
| Year Built | 1986 |
| Manufacturer's Serial Number | 943 |
| 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 | 0-320 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Individual |
| Owner Name | GRENGA ROBERT J |
| Street | 456 E MELODY LN |
| City | GILBERT |
| State | AZ |
| Zip Code | 85234 |
| Region | Western-Pacific |
| County | Maricopa County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1986-06-30 |
| Certificate Issue Date | 1986-04-01 |
| Last Action Date | 2022-08-27 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 50254175 |
| Mode S Code Hex | A1587D |