INJURED EE HAD BEEN USING A CONCRETE VIBRATING RAT-TAIL IN THE PORTHOLE OF AN AIR SLIDE CONVEYOR. AS HE STEPPED DOWN HIS FOOT SLIPPED OFF THE RAILING AND HE FELL TO THE PLATFORM 3 FEET BELOW. HE GRABBED THE RAIL AS HE FELL CAUSING A STRAIN OF THE BICEP MUSCLE AND ROTATOR CUFF. HE ASKED TO BE SEEN BY A DR ON 11-25-02 AND WAS PUT ON RESTRICTED DUTY.