As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ZONE TEMP LIGHT ON W/MC RECALL. GROUNDED - YES. PACK TEMP CNTRL BITE SHOW CONT NO.2 'FLT DECK' TRIM VALVE. RESET CHKS GOOD. NO FAULTS- NO HISTORY 30 DAYS RAN PACKS CYCLED VARIOUS TEMPS -CHKS GOOD NO FAULTS REF: B737-800 FIM 21-62 TASK 903.