EE HAD BEEN OPERATING AN IT28 END LOADER TO LOADSUPPLIES HE HAD DEENERGIZED THE MACHINE & WAS DISMOUNTING AS HIS RIGHT LEG TOUCHED THE GROUND HE TWISTED HIS RIGHT KNEE. HE DR INDICATED TO HI M THAT THIS WAS AN AGGRAVATION OF A PREVIOUS IN JURY. ADDITONAL MEDICAL INFORMATION WILL FOLLOW