Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4177U.
| Tail Number / N-Number | N4177U |
| Manufacturer | ROBINSON HELICOPTER COMPANY |
| Model | R44 II |
| Year Built | 2008 |
| Manufacturer's Serial Number | 12524 |
| 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 | SHIER AVIATION CORP |
| Street | 3753 JOHN J MONTGOMERY DR #2 |
| City | SAN DIEGO |
| State | CA |
| Zip Code | 92123 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2008-10-17 |
| Certificate Issue Date | 2009-01-22 |
| Last Action Date | 2009-01-22 |
| Last Status | Valid Registration |
| Cancellation Date | 2009-03-31 |
| Exported To | ROMANIA |
| Mode S Code | 51170601 |
| Mode S Code Hex | A4F181 |