A linkage mechanism includes a fixing member, a rotary member, a support member and a sliding module. In one embodiment, an apparatus includes: a base frame adapted to position an inspection device relative a turbine component; and a set of mounts connected to the base frame, the set of mounts adapted to connect the base frame to at least one other point of the turbine component and to pivotally connect the base frame to a pivot point of the turbine component. The two vectored thrusters also are equipped with vanes having selectable vane angles to direct separately the air flow from the two vectored thrusters.