EE WAS WORKING ON THE AIR BREATHER ON A 994 FRONT END LOADER. HE DROPPED A TOOL, STARTED TO CLIMB DOWN. HE SLIPPED STARTED TO FALL GRABBED THE PIPE CONNECTED TO THE AIR BREATHER. THE PIPE AND AIR BREATHER WAS NOT SECURED TO THE MOTOR. THE PIPE AND AIR BREATHER CAME OUT AND FELL ON TOP OF EMPLOYEE.