As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE CREW REPORTED RECEIVING A PACK NR 1 FAIL MESSAGE ON THE EICAS. THE NR 2 PACK WAS ON DEFERRAL. MAINTENANCE INSPECTED THE AIRCRAFT AND REMOVED AND REPLACED A DUCT ON THE NR 2 PACK. MINOR LEAKS WERE FOUND ON THE NR 1 SIDE. THE LEAKS WERE SECURED AND BOTH SYSTEMS OPS CHECKED AS PER THE AMM.