| Tail Number / N-Number | N644SD |
| Manufacturer | PILATUS AIRCRAFT LTD |
| Model | PC-12/45 |
| Year Built | 2005 |
| Manufacturer's Serial Number | 644 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 12 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W |
| Engine Model | PT6A SER |
| Engine Type | Turbo-prop |
| Number of Engines | 1 engine |
| Horsepower | 750 hp (560 kW) |
| Type of Registrant | LLC |
| Owner Name | SIERRA DELTA LLC |
| Street | 500 AIRPORT RD STE P |
| City | LITITZ |
| State | PA |
| Zip Code | 17543-7752 |
| Region | Eastern |
| County | Lancaster County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2005-07-11 |
| Certificate Issue Date | 2017-01-17 |
| Last Action Date | 2022-08-19 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 52072653 |
| Mode S Code Hex | A875AB |