As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX INFLIGHT T162/24SEP - LEFT HYDRAULIC QUANTITY EICAS MESSAGE WITH RESERVOIR ANNUNCIATION. GEAR AND FLAPS LOWERED NORMALLY. QUANTITY STABILIZED AT 0.27. LANDED LAX WITHOUT INCIDENT. FOUND DELTA P LEAKING ON LEFT PYLON. REPLACED O-RING. SYSTEM GROUND CHECKED NORMAL OPERATION.