An airborne tree trimming apparatus for installation on a helicopter or the like is described. The apparatus is designed to prevent arcing from power lines and includes a saw assembly having a housing that is at least partially non-conductive an internal combustion engine operatively connected to the saw assembly a boom extension having a lower end connected to the engine, and an upper end attachable to the helicopter, at least a part of the boom extension being non-conductive and a safety cable extending through the boom extension, at least a part of the cable being non-conductive.
