| Tail Number / N-Number | N171UA |
| Manufacturer | BOEING |
| Model | 747-422 |
| Year Built | 1989 |
| Manufacturer's Serial Number | 24322 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 495 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | P&W |
| Engine Model | PW4000 SER |
| Engine Type | Turbo-jet |
| Number of Engines | 4 engines |
| Thrust per Engine | 60,000 pounds-force (266.9 kN) |
| Total Thrust | 240,000 pounds-force (1,067.6 kN) |
| Type of Registrant | Corporation |
| Owner Name | UNITED AIRLINES INC |
| Street | ATTN TREASURER WILLIS TOWER 233 S WACKER DR |
| City | CHICAGO |
| State | IL |
| Zip Code | 60606-7147 |
| Region | Great Lakes |
| County | Cook County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1989-06-30 |
| Certificate Issue Date | 2013-04-01 |
| Last Action Date | 2022-03-16 |
| Expiration Date | 2029-04-30 |
| Status | Valid Registration |
| Mode S Code | 50217247 |
| Mode S Code Hex | A11EA7 |