| Tail Number / N-Number | N557UA |
| Manufacturer | BOEING |
| Model | 757-222 |
| Year Built | 1992 |
| Manufacturer's Serial Number | 26653 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 178 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | P & W |
| Engine Model | PW2037 |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 37,530 pounds-force (166.9 kN) |
| Total Thrust | 75,060 pounds-force (333.9 kN) |
| Type of Registrant | Corporation |
| Owner Name | UNICAL AVIATION INC |
| Street | 680 S LEMON AVE |
| City | CITY OF INDUSTRY |
| State | CA |
| Zip Code | 91789-2934 |
| Region | Western-Pacific |
| County | Los Angeles County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1992-05-19 |
| Certificate Issue Date | 2016-11-15 |
| Last Action Date | 2022-08-16 |
| Expiration Date | 2029-11-30 |
| Status | Valid Registration |
| Mode S Code | 51615457 |
| Mode S Code Hex | A71B2F |