| Tail Number / N-Number | N251ET |
| Manufacturer | ROBINSON HELICOPTER CO |
| Model | R66 |
| Year Built | 2022 |
| Manufacturer's Serial Number | 1105 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROLLS-ROYC |
| Engine Model | 250-C300/A1 |
| Engine Type | Turbo-shaft |
| Number of Engines | 1 engine |
| Horsepower | 300 hp (224 kW) |
| Type of Registrant | Individual |
| Owner Name | ANDERSON GREGORY |
| Street | 200 GOYA RD |
| City | PORTOLA VALLEY |
| State | CA |
| Zip Code | 94028-7308 |
| Region | Western-Pacific |
| County | San Mateo County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2022-01-11 |
| Certificate Issue Date | 2022-07-02 |
| Last Action Date | 2022-07-02 |
| Expiration Date | 2029-07-31 |
| Status | Valid Registration |
| Mode S Code | 50455653 |
| Mode S Code Hex | A25BAB |