| Tail Number / N-Number | N657DJ |
| Manufacturer | GATES LEARJET CORP |
| Model | 55 |
| Year Built | 1983 |
| Manufacturer's Serial Number | 094 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 13 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Engine Manufacturer | GARRETT |
| Engine Model | TFE731 SERIES |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 3,500 pounds-force (15.6 kN) |
| Total Thrust | 7,000 pounds-force (31.1 kN) |
| Type of Registrant | LLC |
| Owner Name | CASTIRON 5 LLC |
| 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 | 1983-12-19 |
| Certificate Issue Date | 2017-11-30 |
| Last Action Date | 2022-08-26 |
| Expiration Date | 2027-11-30 |
| Status | Valid Registration |
| Mode S Code | 52123417 |
| Mode S Code Hex | A8A70F |