As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT PACK LIGHT ILLUMINATED, EXTINGUISHES WITH MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED BITE CHECK OF PACK ZONE TEMPERATURE CONTROLLERS IAW MM 21-61-00-700-806-002 AND ON PACK NR 2 FOUND TVC HAD FAILED. R & R NR 2 PACK TCV IAW MM 21-61-21. OPS CHECK, LEAK TEST GOOD.