As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER START, OBSERVED ILLUMINATION OF LEFT PACK LIGHT DURING MASTER CAUTION RECALL. PACK LIGHT EXTINGUISHES WHEN MASTER CAUTION SYS IS RESET. ACFT GROUNDED. REPLACED TEMPERATURE CONTROL VALVE IAW AMM 21-51-10/401. OPS CHECKED GOOD. NO FAULTS FOUND.