As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT # 488, LAX-BOS. (ETOPS) "AIRPLANE PROHIBITED FROM ER OPERATIONS DUE TO E2 ALERT LEVEL 3-IN-10 EVENT FLIGHT DECK & CABIN TEMP CONTROL A APPY ACI A34-00-01-A . ( AIRPLANE PROHIBITED FROM ETOPS )" (SUPPLEMENTAL INFORMATION TO FOLLOW).