| Tail Number / N-Number | N21144 |
| Manufacturer | EMBRAER |
| Model | EMB-145XR |
| Year Built | 2003 |
| Manufacturer's Serial Number | 145741 |
| 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 | 2019-01-30 |
| Last Action Date | 2021-09-30 |
| Expiration Date | 2029-01-31 |
| Status | Valid Registration |
| Mode S Code | 50340072 |
| Mode S Code Hex | A1C03A |
Deregistered Aircraft 1 of 3. This aircraft was previously assigned the N-number N21144.
| Tail Number / N-Number | N21144 |
| Manufacturer | NIGRO VICTOR E |
| Model | KR-2 |
| Manufacturer's Serial Number | 001 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not 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 |
| Type of Registrant | Individual |
| Owner Name | GAMBLE AVERY T |
| Street | 352 NEWPORT RD |
| City | LEOLA |
| State | PA |
| Zip Code | 17540 |
| County | Cook County |
| Country | US |
| Certificate Issue Date | 1992-05-11 |
| Last Action Date | 1995-08-16 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1995-10-17 |
Deregistered Aircraft 2 of 3. This aircraft was previously assigned the N-number N21144.
| Tail Number / N-Number | N21144 |
| Manufacturer | STINSON |
| Model | HW75 |
| Manufacturer's Serial Number | 7047 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 3 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | Individual |
| Owner Name | MARGO JOSEPH |
| Street | 22113 4TH ST |
| City | AKRON |
| State | OH |
| Zip Code | 44301 |
| Region | Great Lakes |
| County | Cook County |
| Certificate Issue Date | 1956-03-26 |
| Last Status | Valid Registration |
| Cancellation Date | 1970-06-17 |
Deregistered Aircraft 3 of 3. This aircraft was previously assigned the N-number N21144.
| Tail Number / N-Number | N21144 |
| Manufacturer | PIPER |
| Model | PA-28-181 |
| Manufacturer's Serial Number | 288190001 |
| 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 | 105 miles per hour |
| County | Cook County |
| Last Status | N-Number Assigned – but has not yet been registered |