| Tail Number / N-Number | N921SD |
| Manufacturer | MCDONNELL DOUGLAS HELICOPTER |
| Model | 369E |
| Year Built | 1990 |
| Manufacturer's Serial Number | 0428E |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ALLISON |
| Engine Model | 250-C20 SER |
| Engine Type | Turbo-prop |
| Number of Engines | 1 engine |
| Horsepower | 420 hp (313 kW) |
| Type of Registrant | Government |
| Owner Name | COUNTY OF FRESNO |
| Street | FRESNO CO SHERIFF 2200 FRESNO ST |
| City | FRESNO |
| State | CA |
| Zip Code | 93721-1753 |
| Region | Western-Pacific |
| County | Fresno County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1993-10-05 |
| Certificate Issue Date | 1997-05-15 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-05-31 |
| Status | Valid Registration |
| Mode S Code | 53141565 |
| Mode S Code Hex | ACC375 |