As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MSG AFT CABIN TEMP(<P>PERFORMED ZONE TEMP CONTROLLER BITE IAW FIM 21-60 F/T 804. FOUND AFT ZONE TRIM MODULATING VALVE FAULT. REMOVED AND REPLACED AFT ZONE TRIM MODULATING VALVE IAW AMM 21-61-07. OPS CHECK GOOD. NO DEFECTS NOTED.<BR /></P>)