As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ZONE TEMP LIGHT ILLUMINATES ON RECALL. EXT ON RESET. GROUNDED - YES. REF B737-900 FIM 21-62 TASK 842, #2 PZTC BITE LOGGED FLT DECK TRIM VALVE FAULT. RESET FAULT MSG. PZTC BITE VERIFY TESTED GOOD WITHOUT FAULTS. VERIFIED BOTH PACKS OPS CHECKED NORMAL IN ALL TEMP RANGE W/O FAULTS.