As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ALT AUTO 2 STATUS MSG. CABIN AUTO INOP EICAS CAUTION MSG WORKED 4.0 IN MANUAL. FOUND ON BITE TEST, AC MOTOR FAULT AND LOW IN FLOW FAULT. REPLACED CABIN ALT CONTROL PANEL AND BOTH PRESSURE CONTROLLERS. OK FOR SERVICE. ETOPS CATEGORY 'B': DIVERSION OR TURNBACK