As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATED. GROUNDED - YES. ACCOMPLISHED A PACK/ZONE TEMPERATURE CONTROLLER #1 BITE REF B737-900 AMM 21-61-00-700-806-002. "THIS PACK TCV" FAULT ILLUMINATED. REQUIRES REPLACEMENT OF LEFT TCV V139. PARTS REQUIREMENT UPDATED. REMOVED AND REPLACED LEFT TRIM CONTROL VALVE IAW AMM 21-61-09. OPS CHECK GOOD.