| Tail Number / N-Number | N621SC |
| Manufacturer | AGUSTA SPA |
| Model | A109S |
| Manufacturer's Serial Number | 22078 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 8 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W CANADA |
| Engine Model | PW207C |
| Engine Type | Turbo-shaft |
| Number of Engines | 2 engines |
| Horsepower per Engine | 572 hp (427 kW) |
| Total Horsepower | 1,144 hp (853 kW) |
| Type of Registrant | Corporation |
| Owner Name | SOUTH BAY HELICOPTER SERVICE INC |
| Street | 19990 SKYWEST DR |
| City | HAYWARD |
| State | CA |
| Zip Code | 94541-4601 |
| Region | Western-Pacific |
| County | Alameda County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2008-05-26 |
| Certificate Issue Date | 2021-08-12 |
| Last Action Date | 2021-08-12 |
| Expiration Date | 2028-08-31 |
| Status | Valid Registration |
| Mode S Code | 52015607 |
| Mode S Code Hex | A81B87 |