| Tail Number / N-Number | N988BB |
| Manufacturer | MILANI F W |
| Model | RV 4 |
| Manufacturer's Serial Number | BB1 |
| 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 | Co-Ownership |
| Owner Name | FORBES DONALD L |
| Other Names |
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| Street | 616 ROSE VALLEY CT |
| City | CENTRAL POINT |
| State | OR |
| Zip Code | 97502-2744 |
| Region | Northwest Mountain |
| County | Jackson County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1989-07-06 |
| Certificate Issue Date | 2019-04-12 |
| Last Action Date | 2021-11-15 |
| Expiration Date | 2029-04-30 |
| Status | Valid Registration |
| Mode S Code | 53344367 |
| Mode S Code Hex | ADC8F7 |