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 RECALL, EXTINGUISHED DURING MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED PACK/ZONE TEMP CONTROLLER BITE TEST ON NR 1 CONTROLLER IAW MM 21-61-00. TCV FAULT WAS LOGGED FOR PREVIOUS FLIGHT, DUE TO HISTORY. REMOVED, REPLACED AND TESTED LT PACK TRIM MODULATING VALVE, TEMP CONTROL VALVE, IAW MM 21-51-10. OPS NORMAL.