What was found
DURING CLIMBOUT, PACK 1 OVERLOAD MESSAGE APPEARED ON EICAS. CREW RETURNED TO DEPARTURE. REMOVED AND REPLACED NR 1 OVERPRESSURE SWITCH, OPS CHECKED GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING CLIMBOUT, PACK 1 OVERLOAD MESSAGE APPEARED ON EICAS. CREW RETURNED TO DEPARTURE. REMOVED AND REPLACED NR 1 OVERPRESSURE SWITCH, OPS CHECKED GOOD.