As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT REPORT AND EVENT - LEFT PACK TEMP AND CABIN ALTITUDE EICAS MESSAGE. EMERGENCY DESCENT AND DIVERSION TO ROR - PERFORMED BITE CHECK OF PACK TEMP CONTROLLER AND CABIN PRESSURE CONTROLLER PER AMM. NO FAULTS FOUND, ALL MESSAGES CLEARED.