| Tail Number / N-Number | N4780S |
| Type of Reservation | 2 year hold for canceled N-numbers |
| Reserving Party Name | CANCELLED/NOT ASSIGNED |
| Date Reserved | 2018-07-12 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4780S.
| Tail Number / N-Number | N4780S |
| Manufacturer | SIKORSKY |
| Model | HRS-1 |
| Year Built | 1951 |
| Manufacturer's Serial Number | 127787 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 12 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W |
| Engine Model | R1340 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 600 hp (448 kW) |
| Average Cruising Speed | 71 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | WHISPER JET INC |
| Street | 12515 WILLOWS RD |
| City | KIRKLAND |
| State | WA |
| Zip Code | 98034 |
| Country | US |
| Airworthiness Classification | Restricted |
| Airworthiness Date | 1966-04-08 |
| Certificate Issue Date | 1993-08-05 |
| Last Action Date | 2014-09-30 |
| Last Status | Registration Expired - Pending Cancellation |
| Cancellation Date | 2018-07-12 |