| Tail Number / N-Number | N2251U |
| Manufacturer | BOEING |
| Model | 777-300ER |
| Year Built | 2020 |
| Manufacturer's Serial Number | 66591 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 552 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | GE |
| Engine Model | GE90-115B |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 115,540 pounds-force (513.9 kN) |
| Total Thrust | 231,080 pounds-force (1,027.9 kN) |
| Type of Registrant | Corporation |
| Owner Name | UNITED AIRLINES INC |
| Street | 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 | 2020-01-28 |
| Certificate Issue Date | 2020-01-29 |
| Last Action Date | 2022-09-09 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 50373042 |
| Mode S Code Hex | A1F622 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N2251U.
| Tail Number / N-Number | N2251U |
| Manufacturer | BRANTLY |
| Model | B-2B |
| Manufacturer's Serial Number | 410 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 75 miles per hour |
| Type of Registrant | Individual |
| Owner Name | THOMPSON WAYNE L |
| Street | BOX 489 |
| City | BUCHANAN |
| State | VA |
| Zip Code | 24066 |
| County | Cook County |
| Country | US |
| Certificate Issue Date | 1982-12-30 |
| Last Action Date | 2001-02-20 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1989-06-19 |