As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN RECALL IS PUSHED THE RIGHT PACK LIGHT ILLUMINATES. IT EXTINGUISHES WHEN RESET. GROUNDED-YES. TASK CARD COMPLIED WITH PERFORMED PACK TEMPERATURE CONTROL BITE PROCEDURE, REF B737-800 FIM 21-62 TASK 801. BITE TEST FAULTED AT ZONE TRIM VALVE. REMOVED AND REPLACED TRIM VALVE, REF B737-800 AMM 21-61-21. OPERATIONS CHECK GOOD, BITE TEST PASSED, LEAK TEST SUCCESSFUL. NO OTHER FAULTS FOUND AT THIS TIME.