As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENG START CONT CAB ZONE TEMP ON AFTER RECALL. RESETS WITH MASTER CAUTION. GROUNDED - YES. PERFORMED PACK/ZONE BITE TEST. FLIGHT DECK TRIM VALVE LOGGED FAULT ON ZONE TEMP CONT #2. RESET FAULT , RAN BITE TEST A SECOND TIME OPS CHECK NORMAL PER B737-800 AMM 21-61-00-700-806-002.