As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOST PRESSURE ON BOTH A-SYS HYD PUMPS, HYD QTY NML. MTC HAS FOUND NO FLUID LOSS. MOTORED ENG'S AT GATE HAD PRESSURE. CKD CASE DRAIN AND PRESS FILTERS, NO CONTAMINATION FOUND. REPLACED A-SYS HYD PRESS PACKAGE AND CASE DRAIN FILTERS, RAN BOTH ENG'S AND EXERCISED ALL FLIGHT CONTROLS. ALL PRESSURES WERE NORMAL.