As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS 'A' RESERVOIR QUANTITY DECREASED TO ROUGHLY 25 PERCENT. IMPROPER O-RING INSTALLATION. REPLACED O-RING AT EDMP PUMP-SERVICED SYSTEM-LEAKED CHECKED-NONE NOTED. OK FOR SERVICE. FOUND O-RING DISLODGED BETWEEN UNION AND PUMP PORT DUE TO MISSING STEEL BACKUP WASHER. REPLACED BOTH STEEL WASHER AND O-RING TO REPAIR THIS LEAK.