As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED HYDRAULIC SYSTEM (A) QUANTITY DROPPED TO 23 PERCENT INFLIGHT FOLLOWED BY ENGINE DRIVEN HYDRAULIC PUMP LP LIGHT. NO OVERHEAT INDICATIONS. FOUND ACOUSTIC FILTER LEAKING. REPLACED (A) SYSTEM EMDP ACOUSTIC FILTER IAW MM 29-15-27. REPLACED NR 1 ENGINE EDP IAW MM 29-15-12. FLUSHED (A) HYDRAULIC SYSTEM IAW MM 29-15-00.