As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. ON THIRD BRAKE APPLICATION LOW ACCUMULATOR PRESSURE WARNING IS TRIGGERED. ONLY TWO BRAKE APPLICATIONS AVAILABLE. SERVICED BRAKE ACCUMULATOR YELLOW SYSTEM, PER AMM 12-14-32-614-002-A, WAS FOUND AT 600 PSI SERVICED TO 970 PSI NO HELP. LOW PRESSURE AFTER 2 APPLICATIONS. BRAKE ACCUMULATOR REPLACED, PER AMM 29-13-42.