| Tail Number / N-Number | N21UC |
| Manufacturer | GULFSTREAM AEROSPACE |
| Model | GV-SP (G550) |
| Year Built | 2014 |
| Manufacturer's Serial Number | 5484 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 20 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Engine Manufacturer | ROLLS DEUT |
| Engine Model | BR700-710C411 |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 15,385 pounds-force (68.4 kN) |
| Total Thrust | 30,770 pounds-force (136.9 kN) |
| Type of Registrant | Corporation |
| Owner Name | UNITED CO |
| Street | 1005 GLENWAY AVE |
| City | BRISTOL |
| State | VA |
| Zip Code | 24201-3473 |
| Region | Eastern |
| County | Bristol city |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2020-12-16 |
| Certificate Issue Date | 2022-02-07 |
| Last Action Date | 2022-02-07 |
| Expiration Date | 2029-02-28 |
| Status | Valid Registration |
| Mode S Code | 50334356 |
| Mode S Code Hex | A1B8EE |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N21UC.
| Tail Number / N-Number | N21UC |
| Manufacturer | BOEING |
| Model | 727-14 |
| Manufacturer's Serial Number | 18990 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 148 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Number of Engines | 3 engines |
| County | Bristol city |
| Last Status | N-Number Assigned – but has not yet been registered |
| Cancellation Date | 1988-07-28 |