As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START, LT PACK LIGHT ILLUMINATED ON RECALL AND FLIGHT DECK TEMPERATURE WAS UNCONTROLABLE AND VERY HOT. ACFT GROUNDED. REPLACED TEMP CONTROL VALVE LT SIDE REF AMM TASK 21-51-10-000-801 & 21-51-10-400-801. OPS CHECKED NORMAL.