Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N121UA.
| Tail Number / N-Number | N121UA |
| Manufacturer | BOEING |
| Model | 747-422 |
| Year Built | 1999 |
| Manufacturer's Serial Number | 29167 |
| 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) |
| Number of Engines | 4 engines |
| 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 |
| Country | US |
| Airworthiness Date | 1996-05-06 |
| Certificate Issue Date | 2013-04-01 |
| Last Action Date | 2015-12-09 |
| Last Status | Valid Registration |
| Cancellation Date | 2018-01-19 |
| Mode S Code | 50054454 |
| Mode S Code Hex | A0592C |