| Tail Number / N-Number | N1091S |
| Manufacturer | HUGHES |
| Model | 369D |
| Year Built | 1980 |
| Manufacturer's Serial Number | 300691D |
| 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 SER 250HP |
| Engine Type | Turbo-shaft |
| Number of Engines | 1 engine |
| Horsepower | 250 hp (187 kW) |
| Average Cruising Speed | 112 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | TEMSCO HELICOPTERS INC |
| Street | PO BOX 5057 |
| City | KETCHIKAN |
| State | AK |
| Zip Code | 99901-0057 |
| Region | Alaskan |
| County | Ketchikan Gateway Borough |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1980-03-27 |
| Certificate Issue Date | 1980-07-25 |
| Last Action Date | 2020-08-10 |
| Expiration Date | 2027-10-31 |
| Status | Valid Registration |
| Mode S Code | 50024257 |
| Mode S Code Hex | A028AF |