As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATED DURING TAXI. LEFT PACK LIGHT EXTINGUISHED ON MASTER CAUTION RESET. ACFT GROUNDED. PACK CONTROLLER FAULTS FOR THE LT PACK TCV. REMOVED AND REPLACED THE LT TEMP CONTROL VALVE IAW AMM 21-51-10. OPS CHECKED GOOD.