| Tail Number / N-Number | N645SK |
| Manufacturer | RAYTHEON AIRCRAFT COMPANY |
| Model | 58 |
| Manufacturer's Serial Number | TH-2118 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Type of Registrant | Corporation |
| Owner Name | KNAFEL AVIATION CORP |
| Street | PO BOX 311 |
| City | CHILMARK |
| State | MA |
| Zip Code | 02535-0311 |
| Region | New England |
| County | Dukes County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2006-09-28 |
| Last Action Date | 2021-04-12 |
| Expiration Date | 2028-05-31 |
| Status | Valid Registration |
| Mode S Code | 52074550 |
| Mode S Code Hex | A87968 |