| Tail Number / N-Number | N399NS |
| Manufacturer | AEROSPATIALE |
| Model | AS350 B2 ECUREUIL |
| Year Built | 1991 |
| Manufacturer's Serial Number | 2505 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | TURBOMECA |
| Engine Model | ARRIEL 1SER |
| Engine Type | Turbo-shaft |
| Number of Engines | 1 engine |
| Horsepower | 681 hp (508 kW) |
| Type of Registrant | LLC |
| Owner Name | NORTHSTAR TREKKING LLC |
| Street | 1910 RENSHAW WAY |
| City | JUNEAU |
| State | AK |
| Zip Code | 99801-9391 |
| Region | Alaskan |
| County | Juneau City and Borough |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1992-02-24 |
| Certificate Issue Date | 2018-03-15 |
| Last Action Date | 2020-10-22 |
| Expiration Date | 2028-03-31 |
| Status | Valid Registration |
| Mode S Code | 51122565 |
| Mode S Code Hex | A4A575 |