What was found
SHORTLY AFTER TAKEOFF THE CREW CALLED IN TO NOTIFY, HAD LEFT BODY GEAR PRIMARY/ALT LIGHT ON PER QRH AND ARE RETURNING TO ORD, 110 THOUSAND POUNDS OF FUEL WAS DUMPED AS A PRECAUTION BEFORE LANDING. DURING GROUND INSPECTION, MAINTENANCE WAS UNABLE TO IDENTIFY ANY OBVIOUS DAMAGE TO THE AFFECTED SYSTEM EXCEPT FOR A RUPTURED HYDRAULIC LINE FROM THE LT BODY TRUCK POSITIONING FUSE TO THE SUPPORT BRACKET ON THE TRUCK. INSTALLED TEMPORARY HYDRAULIC FLEXIBLE LINES, TWO EACH IAW GMM 6.3-1. RESET HYDRAULIC FUSE AND BLED TILT ACTUATOR IAW 32-13-24. TILT ACTUATOR OPS CHECK NORMAL, IAW AMM 32-13-15.