| Tail Number / N-Number | N991ST |
| Manufacturer | AGUSTAWESTLAND PHILADELPHIA CO |
| Model | AW119MKII |
| Year Built | 2022 |
| Manufacturer's Serial Number | 15830 |
| 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 | PT6B-37A |
| Engine Type | Turbo-shaft |
| Number of Engines | 1 engine |
| Horsepower | 900 hp (671 kW) |
| Type of Registrant | Government |
| Owner Name | NAVAL AIR SYSTEMS COMMAND |
| Street | AIR 2.2.2.4 SUITE 453 BLDG 2272 47123 BUSE ROAD UNIT IPT |
| City | PATUXENT RIVER |
| State | MD |
| Zip Code | 20670-1547 |
| Region | Eastern |
| County | St. Mary's County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2022-05-18 |
| Certificate Issue Date | 2023-02-02 |
| Last Action Date | 2023-02-02 |
| Expiration Date | 2030-02-28 |
| Status | Valid Registration from a Trainee |
| Mode S Code | 53353774 |
| Mode S Code Hex | ADD7FC |