Abstract: A nacelle-mounted multiple-appliance lift system has a first lifting appliance and a second lifting appliance mounted in a nacelle of a wind turbine. The first and second lifting appliances are each mounted on main bearing housing securements, gearbox pillow blocks, or both the main bearing housing securements and the gearbox pillow blocks. The first and second lifting appliances share one or both of the main bearing housing securements and the gearbox pillow blocks.

Abstract: A method of dismounting or mounting a rotor blade of a wind turbine involves: supporting a rotor blade of a wind turbine with a ground-based lift system at a tip-side position on the rotor blade in relation to a center of gravity of the rotor blade, and supporting the rotor blade with a nacelle-mounted lift system at a hub-side position on the rotor blade in relation to the center of gravity of the rotor blade, so that the rotor blade is supported by the ground-based lift system and the nacelle-mounted lift system in a substantially non-vertical orientation with respect to the ground; and, then separating the rotor blade from or connecting the rotor blade to a rotor hub of the wind turbine.