| Tail Number / N-Number | N521HB |
| Manufacturer | MCDONNELL DOUGLAS HELICOPTER |
| Model | 500N |
| Year Built | 1998 |
| Manufacturer's Serial Number | LN084 |
| 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 | CITY OF HUNTINGTON BEACH |
| Street | 2000 MAIN ST |
| City | HUNTINGTON BEACH |
| State | CA |
| Zip Code | 92648-2702 |
| Region | Western-Pacific |
| County | Orange County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1998-07-31 |
| Certificate Issue Date | 2016-11-07 |
| Last Action Date | 2019-06-25 |
| Expiration Date | 2022-11-30 |
| Status | Third Notice for Registration Renewal |
| Mode S Code | 51506526 |
| Mode S Code Hex | A68D56 |