As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATED ON CLIMBOUT, EXTINGUISHES ON MASTER CAUTION RESET. ACFT GROUNDED. BITE SHOWS TCV FAULT GUIDE AND ON PREVIOUS FLIGHT. REPLACED TEMP CONTROL VALVE IAW MM 21-51-10, LEAK AND OPS CHECKED GOOD. BITE CHECKED GOOD.