As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATES OM MC RECALL. RESETS W/MC RESET. GROUNDED - YES. BITE OF M1442 ZONE TEMP CONTROLLER #1 FAULTS "TCV THIS PACK" REF B737-800 FIM 21-62 TASK 830. REPLACED TCV V139. INSTALLATION TEST PASSES, NO LEAKS NOTED REF B737-800 AMM 21-51-10-400-801.