As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATED. RESET WITH MASTER CAUTION. ACFT GROUNDED. CONFIRMED FAULT, NR 1 PACK ZONE TEMP CONTROLLER BITE TEST SHOWS HARD FAIL OF THE LT TCV NR 1 (V139). REMOVED & REPLACED THE TCV IAW AMM 21-51-10, LEAK CHECKED & GROUND FUNCTIONAL CHECKED NORMAL IAW AMM 21-61-00-700-806-002. NR 2 PACK ZONE TEMP CONTROLLER SHOWS NO FAULTS.