Desert Southwest linemen show us an example of an insulator change using an N619DE helicopter. This is a relatively new work process that began early this year. It allows repairs like this to be completed very quickly resulting in shorter outage times and much less cost compared to conventional methods such as bringing in a bucket truck. All required tools and hardware are also flown into the structure tower.
The first step is the helicopter removes the old insulator from its cradle. The pilot then flies in the new insulator and sets the end of it onto the cradle of the old insulator. The linemen guide the new insulator horizontally into the cradle as the pilot lowers it down. The linemen then attach the insulator to hardware and conductor.