As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BRAKE DEGRADED EICAS CAUTION MESSAGE DISPLAYED WHILE TAXIING. RETURNED TO GATE AND NR 1 HYD FLUID DOWN 25 PERCENT. BLED AIR FROM NR 1 AND NR 2 HYD SYSTEMS IAW AMM 29-10-00-803-A. PRESSURIZED HYD SYSTEM IAW AMM 29-10-00-860-801-A. OPS CHECK GOOD. NO LEAKS NOTED. OK FOR SERVICE AT THIS TIME.