As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATB - DURING CLIMB-OUT AFTER DEPARTING LAX, HYD SYSTEM NR 3 ELEV OFF LIGHT ILLUMINATED WITH RAPID LOSS OF NR 3 HYDRAULIC FLUID FLUID. DUMPED FUEL AND RETURNED TO LAX FOR LANDING. ACCOMPLISHED APPROPRIATE ABNORMAL CHECK LIST AND ALTERNATE GEAR EXTENSION. FOUND NR 3 HYD CASE DRAIN LINE ON RIGHT SIDE CRACKED. WAITING FOR NEW LINE. (M)