As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MSG -L PACK TEMP-. PACK INOP LIGHT ON. LIGHT RE-ILLUM WHEN PACK RESET IN STBY. CREW COMMENTS: AUTO MODE INOP. CONCURRED WITH CREW, OPS CHECK LEFT PACK IN STBY MODE IS OPERATIONAL. -INF- :1EA 7540158 LAXCC4. RPL- :BITE CK SHOWS COMPRESSOR OUTLET SENSOR, RPL SENSOR PER MM, OPS CHK OKAY.