PurposeALLOWS LOCKING CONTROL WHEEL IN ANY ATTITUDE AND PROVIDES MEANS OF A TTACHING PROTRACTOR AND TORQUE WRENCH. BASE ASSEMBLIES ATTACH TO PILOT AND CO-PILOT CONTROL WHEELS AND ARE USED AS ADAPTER FOR EQUIPMENT TO CHECK FORCE AND ANGULAR MOVEMENT OF WHEELS ANDAirplane757Usage CodeMAINTENANCE, OVERHAUL 