| Tail Number / N-Number | N4466 |
| Manufacturer | ROBINSON HELICOPTER COMPANY |
| Model | R44 II |
| Year Built | 2004 |
| Manufacturer's Serial Number | 10374 |
| 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 | LLC |
| Owner Name | BACK NINE AERIAL LLC |
| Street | 20115 W RUSTIC RIDGE DR |
| City | NEW BERLIN |
| State | WI |
| Zip Code | 53146-3036 |
| Region | Great Lakes |
| County | Waukesha County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Multiple |
| Airworthiness Date | 2016-07-08 |
| Certificate Issue Date | 2016-03-19 |
| Last Action Date | 2021-10-23 |
| Expiration Date | 2029-03-31 |
| Status | Valid Registration |
| Mode S Code | 51262021 |
| Mode S Code Hex | A56411 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N4466.
| Tail Number / N-Number | N4466 |
| Manufacturer | ENSTROM |
| Model | F-28A |
| Manufacturer's Serial Number | 018 |
| Aircraft Type | Rotorcraft |
| 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 | 75 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | R J ENSTROM CORP |
| Street | BOX 277 |
| City | MENOMINEE |
| State | MI |
| Zip Code | 49858 |
| County | Waukesha County |
| Country | US |
| Certificate Issue Date | 1968-10-21 |
| Last Action Date | 1999-01-20 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1999-03-12 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N4466.
| Tail Number / N-Number | N4466 |
| Manufacturer | WACO |
| Model | 10 |
| Manufacturer's Serial Number | 1326 |
| 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 | 111 miles per hour |
| Type of Registrant | Individual |
| Owner Name | KLENDWORTH EARL G |
| County | Waukesha County |
| Last Status | Valid Registration |
| Cancellation Date | 1929-10-11 |