A MEMBER OF CONTRACTOR'S SURVEY CREW SUSTAINED INJURY TO LEFT ELBOW. EE SPRAINED LEFT ELOBW WHILE MANUALLY PUSHING A PERSONNEL CARRIER. THE CARRIER HAD BECOME DISABLED DUT TO DEPLETED BATTERIE S. *ACCORDING TO EE, HE HAD INJURED THE ELBOW PREVIOUSLY PRIOR TO EMPLOYMENT BY CONTRACTOR. THIS INJURY REQUIRED SURGERY. HIS PUIEHING ON THE CARRIER AGGRAVATED THE PRE-EXISTING CONDITION RES