| Tail Number / N-Number | N557TS |
| Manufacturer | HUGHES |
| Model | 369D |
| Year Built | 1976 |
| Manufacturer's Serial Number | 1160037D |
| 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-C20B |
| Engine Type | Turbo-shaft |
| Number of Engines | 1 engine |
| Horsepower | 420 hp (313 kW) |
| Average Cruising Speed | 112 miles per hour |
| Type of Registrant | LLC |
| Owner Name | LONE OAK AVIATION LLC |
| Street | 41321 MANITOU RD |
| City | STAYTON |
| State | OR |
| Zip Code | 97383 |
| Region | Northwest Mountain |
| County | Marion County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2016-10-17 |
| Certificate Issue Date | 2017-01-19 |
| Last Action Date | 2022-12-29 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 51615446 |
| Mode S Code Hex | A71B26 |