As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT OF STL, A SYS QTY DROPPED TO 1.2 GAL AFTER GEAR RETRACTION. ONCE AT CRUISE ATL, A SYS QTY SLOWLY DROPPED TO .2 GAL. A SYS LOSS PROCEDURES WERE FOLLOWED. LANDING GEAR WAS LOWERED NORMALLY AND FLAPS WERE LOWERED BY ALT METHOD. LOW PRESS LIGHTS DID NOT ILLUMINATE. REPLACED A SYS HYD PRESS LINE FROM NR 2 ENG IN 48 SECTION.