As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: RETUEN TO GATE BRAKES PARK BRK LO PRE AFTER STARTING ENGINE 1 ACCUM PRESSURE DROPS TO BELOW GREEN ARC, AND BRAKE PRESS @1000 PSIW/ ACCOMPANYING ECAM. MAINTENANCE FILLED ACCUMULATOR YELLOW SYS IAW AMM 12-14-29-001-614 PERFROMED FUNCTIONAL CHECK OF BRAKING SYS IAW AMM 32-44-11-200-001A. MSG CLEARED. AIRCRAFT TAXIED TO DE- ICEPAD WITH OUT ANY PROBLEMS/ OK TO CONTINUE SERVICE.