As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF EICAS MSG 1) CHYD QTY 2)C HYD 2 OVHT CENTER HYD SYSTEM REAAD 0.16 AIRCRAFT RETURNED TO FIELD WITHOUT FURTHER INCIDENT GROUNDED BY MAINTENANCE. TROUBLE SHOT AND FOUND OUTBOARD SLAT PDU CONTROL VALVE MODULE LEAKING .REMOVED AND REPLACED LEFT OUTBOARD SLAT PDU CONTROL VALVE MODULE IAW AMM 27-81-12 SERVICED HYDRAULICS AND RETURNED A/C TO SERVICE .