| Tail Number / N-Number | N12225 |
| Manufacturer | BOEING |
| Model | 737-824 |
| Year Built | 1998 |
| Manufacturer's Serial Number | 28934 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 149 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | CFM INTL. |
| Engine Model | CFM56 SERIES |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Horsepower per Engine | 2,200 hp (1,641 kW) |
| Total Horsepower | 4,400 hp (3,282 kW) |
| 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 | 1998-12-21 |
| Certificate Issue Date | 2017-03-28 |
| Last Action Date | 2022-11-09 |
| Expiration Date | 2030-03-31 |
| Status | Valid Registration |
| Mode S Code | 50056734 |
| Mode S Code Hex | A05DDC |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N12225.
| Tail Number / N-Number | N12225 |
| Manufacturer | LOCKHEED |
| Model | ORION 9 |
| Manufacturer's Serial Number | 183 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | SALE REPORTED |
| Street | PO BOX 25082 |
| City | OKLAHOMA CITY |
| State | OK |
| Zip Code | 73125 |
| Region | Southwestern |
| County | Cook County |
| Certificate Issue Date | 1935-12-07 |
| Last Status | Valid Registration |
| Cancellation Date | 1937-01-08 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N12225.
| Tail Number / N-Number | N12225 |
| Manufacturer | HANDLEY PAGE |
| Model | HP-137 MK1 |
| Manufacturer's Serial Number | 225 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 20 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 187 miles per hour |
| County | Cook County |
| Last Status | N-Number Assigned – but has not yet been registered |
| Cancellation Date | 1988-03-14 |