As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON RECALL LT PACK LIGHT IS ON THE LIGHT GOES OUT WHEN MASTER CAUTION IS PUSHED. ACFT GROUNDED. ONE PREVIOUS FLT FAULT OF "THIS PACK TCV" ON NR 1 ZONE TEMP CONTROLLER. PERFORMED PACK/ZONE TEMP CONTROLLER BITE REF MM 21-61-00-700-806-002 W/ NO DEFECTS NOTED. FAULT RESET. RAN VERIFY TEST 3 TIMES W/ NO FURTHER FAULTS. ETOPS GROUND VERIFICATION TEST SUCCESSFUL.