As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATES DURING RECALL THEN RESETS. GROUNDED - YES. PERFORMED PACK/ZONE TEMP CONTROLLER BITE TEST REF B737-900 FIM 21-62 TASK 801. TCV FAIL LIGHT DISPLAYS BUT EXTINGUISHES WHEN RESET. DUE TO PREVIOUS HISTORY, REPLACED LH TCV REF B737-900 AMM 21-51-10/401. INSTALLATION TESTS PASSED WITH NO DISCREPANCIES NOTED. ETOPS VERIFICATION SUCCESSFUL.