As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATES UPON RECALL AND EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. REMOVED AND REPLACED LH PACK TEMP CONTROL VALVE AS REQUIRED OPS CKD GOOD NO LEAKS NOTED REF B737-900 AMM 21-51-10-400-801. PERFORMED PACK/ZONE TEMP CONTROLLER BITE CK NO FAULTS FOUND. REF AMM 21-61-00-700-806-002.