As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CENTER HYDRAULIC LEAK SUBSEQUENT LOW HYDRAULIC PRESSURE, FOLLOWED BY CENTER SYSTEM FAILURE. THE AIRCRAFT WAS GROUNDED. MAINTENANCE FOUND HEAVY LEAK AT FLAP/SLAP SHUTOFF VALVE MODULE AND REPLACED FLAP/SLAT MODULE PER AMM 27-51-48. MAINTENANCE PERFORMED SATISFACTORY OPERATIONAL CHECK. NO LEAKS NOTED.