As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LT OVERHEAD, WOULD NOT RESET OVHD IAW QRH. IT DID RESET WITH MASTER CAUTION FWD PANEL BUT COMES BACK ON RECALL. ACFT GROUNDED. VERIFIED FAULT, NR 1 CONTROLLER LOGGED THIS PACK TCV. PERFORMED FIM 21-62 TASK 830. REPLACED LT PACK V139 TCV REF MM 21-51-10. GROUND VERIFICATION TESTS GOOD.