As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT WOULD NOT RESET. ACFT GROUNDED. PERFORMED LEFT PACK CONTROLLER BITE IAW FIM 21-62 TASK 801, TCV LIGHT ILLUMINATED AND WILL NOT RESET. TEMP CONTROL VALVE REMOVED AND REPLACED IAW AMM 21-51-10-000-801, AND 21-51-10-400-801. GROUND VERIFICATION CHECKED GOOD.