Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4120B.
| Tail Number / N-Number | N4120B |
| Manufacturer | AERO COMMANDER |
| Model | 520 |
| Year Built | 1953 |
| Manufacturer's Serial Number | 52099 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | GO-435C&D SER |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 260 hp (194 kW) |
| Total Horsepower | 520 hp (388 kW) |
| Average Cruising Speed | 147 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | GREAT CIRCLE AVN |
| Street | PO BOX 243 |
| City | MIAMI SPRINGS |
| State | FL |
| Zip Code | 33166 |
| Country | US |
| Last Action Date | 1977-01-14 |
| Last Status | Revoked – Canceled |
| Cancellation Date | 2012-06-04 |
| Mode S Code | 51156750 |
| Mode S Code Hex | A4DDE8 |