As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L PACK LIGHT ILLUMINATED ON MASTER RECALL. GROUNDED - YES. REL PER MEL 21-32B. LEFT PACK TEMP CONTROL ZONE CONTROLLER INOP, TCV ILLUMINATED ON LH PACK CONTROLLER, PERFORMED PACK/ZONE TEMP CONTROLLER BITE TEST PER B737-900 AMM 21-61-00-700-806-002, GREEN "GO" LIGHT ILLUMINATED, DUE TO HISTORY REMAINS ON MEL. REMOVED AND REPLACED #1 PACK ZONE TEMP CONTROLLER & OPS CKS NML IAW AMM 21-61-00.