| Tail Number / N-Number | N521TC |
| Manufacturer | HUGHES |
| Model | 369HE |
| Year Built | 1969 |
| Manufacturer's Serial Number | 1090201E |
| 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-C20 SER |
| Engine Type | Turbo-prop |
| Number of Engines | 1 engine |
| Horsepower | 420 hp (313 kW) |
| Average Cruising Speed | 112 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | TRE AVIATION CORP |
| Street | 3511 SILVERSIDE RD STE 105 |
| City | WILMINGTON |
| State | DE |
| Zip Code | 19810-4902 |
| Region | Eastern |
| County | New Castle County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1994-01-26 |
| Certificate Issue Date | 2011-04-20 |
| Last Action Date | 2023-01-09 |
| Expiration Date | 2030-04-30 |
| Status | Valid Registration |
| Mode S Code | 51507121 |
| Mode S Code Hex | A68E51 |