| Tail Number / N-Number | N21154 |
| Manufacturer | EMBRAER |
| Model | EMB-145XR |
| Year Built | 2003 |
| Manufacturer's Serial Number | 145772 |
| 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 | 2003-12-12 |
| Certificate Issue Date | 2019-05-31 |
| Last Action Date | 2022-02-23 |
| Expiration Date | 2029-05-31 |
| Status | Valid Registration |
| Mode S Code | 50340135 |
| Mode S Code Hex | A1C05D |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N21154.
| Tail Number / N-Number | N21154 |
| Manufacturer | CESSNA |
| Model | A185F |
| Manufacturer's Serial Number | 18503050 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 127 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | DORR AVIATION INC |
| Street | MARLBORO AIRPORT |
| City | MARLBORO |
| State | MA |
| Zip Code | 01752 |
| Region | New England |
| County | Cook County |
| Certificate Issue Date | 1976-08-02 |
| Last Status | Valid Registration |
| Cancellation Date | 1976-11-11 |
| Exported To | CANADA |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N21154.
| Tail Number / N-Number | N21154 |
| Manufacturer | STINSON |
| Model | HW75 |
| Year Built | 1939 |
| Manufacturer's Serial Number | 7046 |
| 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 | Co-Ownership |
| Owner Name | DZIOBAK BENJAMIN |
| Street | 12261 WAYNE ROAD |
| City | ROMULUS |
| State | MI |
| Zip Code | 48174 |
| Region | Great Lakes |
| County | Cook County |
| Certificate Issue Date | 1949-08-12 |
| Last Status | Valid Registration |
| Cancellation Date | 1956-02-22 |