| Tail Number / N-Number | N11121 |
| Manufacturer | EMBRAER |
| Model | EMB-145XR |
| Year Built | 2003 |
| Manufacturer's Serial Number | 145683 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 55 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Engine Manufacturer | ROLLS-ROYC |
| Engine Model | AE3007 SER |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 6,442 pounds-force (28.7 kN) |
| Total Thrust | 12,884 pounds-force (57.3 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 | 2005-02-25 |
| Certificate Issue Date | 2019-06-26 |
| Last Action Date | 2022-02-23 |
| Expiration Date | 2029-06-30 |
| Status | Valid Registration |
| Mode S Code | 50031242 |
| Mode S Code Hex | A032A2 |
Deregistered Aircraft 1 of 3. This aircraft was previously assigned the N-number N11121.
| Tail Number / N-Number | N11121 |
| Manufacturer | HUGHES |
| Model | 369D |
| Year Built | 1979 |
| Manufacturer's Serial Number | 890556D |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 112 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | HUGHES HELICOPTERS |
| Street | CENTINELA & TEALE STREET |
| City | CULVER CITY |
| State | CA |
| Zip Code | 90230 |
| Region | Western-Pacific |
| County | Cook County |
| Country | US |
| Certificate Issue Date | 1980-04-09 |
| Last Status | Valid Registration |
| Cancellation Date | 1980-04-17 |
| Exported To | CANADA |
Deregistered Aircraft 2 of 3. This aircraft was previously assigned the N-number N11121.
| Tail Number / N-Number | N11121 |
| Manufacturer | STINSON |
| Model | SM-8A |
| Year Built | 1931 |
| Manufacturer's Serial Number | M-4121 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 123 miles per hour |
| Type of Registrant | Co-Ownership |
| Owner Name | SPERNAK GEORGE & GRASSO CONSOLINO |
| Street | 212 PEARL STREET |
| City | BRIDGEPORT |
| State | CT |
| Zip Code | 06608 |
| Region | New England |
| County | Cook County |
| Country | US |
| Certificate Issue Date | 1946-06-28 |
| Last Status | Valid Registration |
| Cancellation Date | 1951-11-23 |
Deregistered Aircraft 3 of 3. This aircraft was previously assigned the N-number N11121.
| Tail Number / N-Number | N11121 |
| Manufacturer | MOONEY |
| Model | M20J |
| Manufacturer's Serial Number | 241139 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 126 miles per hour |
| County | Cook County |
| Last Status | N-Number Assigned – but has not yet been registered |