Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N457R.
| Tail Number / N-Number | N457R |
| Manufacturer | ROBINSON HELICOPTER COMPANY |
| Model | R44 II |
| Year Built | 2009 |
| Manufacturer's Serial Number | 12888 |
| 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) |
| Engine Manufacturer | LYCOMING |
| Engine Model | IO-540-AE1A5 |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 260 hp (194 kW) |
| Type of Registrant | Corporation |
| Owner Name | ZEN AVIATION INC |
| Street | PO BOX 841 |
| City | DOVER |
| State | DE |
| Zip Code | 19903-0841 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2009-08-26 |
| Certificate Issue Date | 2010-08-16 |
| Last Action Date | 2010-08-16 |
| Last Status | Valid Registration |
| Cancellation Date | 2011-07-06 |
| Exported To | CANADA |
| Mode S Code | 51306624 |
| Mode S Code Hex | A58D94 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N457R.
| Tail Number / N-Number | N457R |
| Manufacturer | ROBINSON HELICOPTER |
| Model | R44 |
| Year Built | 2007 |
| Manufacturer's Serial Number | 1722 |
| 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) |
| Engine Manufacturer | LYCOMING |
| Engine Model | O-540-F1B5 |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 260 hp (194 kW) |
| Type of Registrant | Corporation |
| Owner Name | CENTRAL ILLINOIS AIR CORP |
| Street | 480 AIRPORT RD |
| City | MATTOON |
| State | IL |
| Zip Code | 61938-9228 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2007-05-24 |
| Last Action Date | 2007-06-28 |
| Last Status | Valid Registration |
| Cancellation Date | 2007-08-13 |
| Exported To | UNITED KINGDOM |
| Mode S Code | 51306624 |
| Mode S Code Hex | A58D94 |