| Tail Number / N-Number | N186DF |
| Manufacturer | FINE DAVID |
| Model | RV-4 |
| Manufacturer's Serial Number | 1137 |
| 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 | FINE DAVID E |
| Street | PO BOX 2637 |
| City | BIGFORK |
| State | MT |
| Zip Code | 59911-2637 |
| Region | Northwest Mountain |
| County | Flathead County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2000-09-28 |
| Certificate Issue Date | 1996-03-13 |
| Last Action Date | 2022-06-10 |
| Expiration Date | 2029-11-30 |
| Status | Valid Registration |
| Mode S Code | 50253507 |
| Mode S Code Hex | A15747 |