Summit Aviation now serving Leonardo AW139 owners and operators Summit Aviation Press Release | February 4, 2021 Estimated reading time 1 minute, 15 seconds. Summit Aviation, a Greenwich AeroGroup Company, announced that it has included the Leonardo AW139 helicopter to its Part 145 Certified Repair Station certificate. This newly added capability allows Summit to perform aircraft maintenance including inspections, overhaul, repair and/or modification for AW139 owners and operators. “We have been serving similar types of aircraft owners and operators since 1960,” said Ralph Kunz, ...