EE WAS REPAIRING THE WINDSHIELD WIPERS ON TRUCK.HE DROPPED A WRENCH & WHILE DESCENDING THE TRUCKLADDER TO RETRIEVE IT HIS FOOT SLIPPED ON THE BOTTOM STEP CAUSING HIM TO FALL ONTO THE CONRETE F LOOR. HE LANDED ON HIS LEFT SHOULDER. THE INJURYHAS INITIALLY BEEN DIAGNOSED AS AN ACUTE SPRAIN.