| Tail Number / N-Number | N257SJ |
| Manufacturer | GATES LEARJET CORP |
| Model | 55 |
| Year Built | 1985 |
| Manufacturer's Serial Number | 55-118 |
| 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 | TFE731-3AR |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 3,880 pounds-force (17.3 kN) |
| Total Thrust | 7,760 pounds-force (34.5 kN) |
| Type of Registrant | Non Citizen Corporation |
| Owner Name | N257SJ AVIATION CORP |
| Street | 1232 CHOPTANK RD |
| City | MIDDLETOWN |
| State | DE |
| Zip Code | 19709-9038 |
| Region | Eastern |
| County | New Castle County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2007-05-03 |
| Certificate Issue Date | 2021-09-23 |
| Last Action Date | 2023-02-14 |
| Expiration Date | 2028-09-30 |
| Status | Non-citizen Corporations which have not returned their flight hour reports |
| Mode S Code | 50471430 |
| Mode S Code Hex | A27318 |