As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI, IN BRAKE PRESSURE LOST B SYSTEM PRESSURE LOW AND QTY LESS THAN 1/4 NORMAL BRAKES ACCUMULATOR PRESSURE LOW. FOUND HIGH PRESSURE FILTER MODULE LEAKING FROM WEEP HOLE. REPLACED HI PRESS FILTER MOD PER M/M (P/N 297001913) (S/N 0943) OFF (S/N 0715) LOG NUMBER C346311001.