| Tail Number / N-Number | N990SL |
| Manufacturer | MESSERSCHMITT-BOLKOW-BLOHM |
| Model | BK 117 B-2 |
| Year Built | 1986 |
| Manufacturer's Serial Number | 7057 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 7 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | LTS-101 SER |
| Engine Type | Turbo-shaft |
| Number of Engines | 2 engines |
| Horsepower per Engine | 317 hp (236 kW) |
| Total Horsepower | 634 hp (473 kW) |
| Type of Registrant | Corporation |
| Owner Name | GUARDIAN HELICOPTERS INC |
| Street | 67 D ST |
| City | FILLMORE |
| State | CA |
| Zip Code | 93015-1668 |
| Region | Western-Pacific |
| County | Ventura County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2002-05-07 |
| Certificate Issue Date | 2022-12-30 |
| Last Action Date | 2022-12-30 |
| Expiration Date | 2029-12-31 |
| Status | Valid Registration |
| Mode S Code | 53352076 |
| Mode S Code Hex | ADD43E |