EE WAS OPERATING THE LUBE/FUEL TRUCK, AND IN THE PROCESS OF SERVICING A KOMATSU 475 DOZER. HE WAS ON THE CAB DECK LEVEL AND ATTEMPTING TO DISMOUNT TO TURN ON A PUMP WHEN HE SLIPPED FROM THE DE CK OR TRACK AREA, AND FELL TO THE GROUND. THE FALL CAUSED A LATERIAL TIBIAL PLATEAU FRACTURE TO THE RIGHT LEG.