Designation applied to aircraft modified with a 650 shp Garrett AirResearch turboshaft and other updated equipment.
Aircraft modified by Aviation Specialties and produced and marketed by Helitec with a 650SHP Garrett AiResearch TPE-331-3U-303 turboshaft and updated equipment. Unknown number converted. 
List of Operators of Sikorsky S-55T | |
| From | Organisation with model S-55T | |||||
Construction Numbers | Help Us | |
| C/N | Year | History | ||