As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT HYDRAULIC SYSTEM QTY AT 4 WITH LIGHT ON SECURED. LEFT HYDRAULIC SYSTEM QTY WENT TO 9 CONTINUED TO ATL. REPLACED LEFT HYDRAULIC AFT FILTER PRESSURE MODULE PIPE ASSEMBLY AND ADJACENT BRAIDED HOSE. SERVICE LEFT HYDRAULIC SYSTEM PER M/M. RAN LEFT ENGINE, NO LEAKS NOTED. APU WAS NOT RUNNING AT ANYTIME DURING THIS EVENT.