| Tail Number / N-Number | N166GS |
| Manufacturer | ROBINSON HELICOPTER CO |
| Model | R66 |
| Year Built | 2015 |
| Manufacturer's Serial Number | 0593 |
| 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 | LLC |
| Owner Name | WESTERN SKY AVIATION LLC |
| Street | 7305 E GREENWAY RD |
| City | SCOTTSDALE |
| State | AZ |
| Zip Code | 85260-1603 |
| Region | Western-Pacific |
| County | Maricopa County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2015-02-18 |
| Certificate Issue Date | 2021-07-15 |
| Last Action Date | 2021-07-15 |
| Expiration Date | 2028-07-31 |
| Status | Valid Registration |
| Mode S Code | 50204237 |
| Mode S Code Hex | A1089F |