Airbus Helicopters Model MBB-BK117 A-1, MBB-BK117 A-3, MBB-BK117 A-4, MBB-BK117 B-1, MBB-BK117 B-2, MBB-BK117 C-1, MBB-BK117 C-2, MBB-BK117 C-2e, MBB-BK117 D-2, MBB-BK117 D-2m, BO105 A, BO105 C, BO105 D, BO105 S, and certain Model BO105 LS A-3 helicopters, to require replacing certain swashplate bellows and inspecting the swashplate assembly - 2016-SW-027-AD