As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB ZONE TEMP LIGHT ON DURING RECALL. GROUNDED - YES. PERFORMED PACK TEMP BITE TEST REF B737-800 AMM 21-62-801. R PACK CONTROLLER FLIGHT DECK TRIM VALVE FAULT LIGHT. REMOVED AND REPLACED ZONE TRIM AIR VALVE (V143) IAW AMM 21-61-21. REF B737-800 FIM 21-62 TASK 832 NO LEAKS NOTED. GROUND VERIFICATION TEST IS GOOD. THIS CLEARS MEL 21-21G.