CHECKING BEARING CLEARANCES ON A CONVEYOR BELT. HE WAS CLIMBING OFF THE CONVEYOR BELT WHEN HE PUT HIS RIGHT LEG ON THE FLOOR WITH ALL OF HIS WEIGHT & FELT HIS RIGHT KNEE TWIST. HE HAD SURGERY ON 6/5/03 FOR A MENISCAL TEAR. IT WAS DETERMINED ON 7/10/03 THAT THE UNDERLYING CAUSE WAS WORK RELATED VS. DISEASE.