As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER START, DURING RECALL THE AIR CONDITION LIGHT ILLUMINATED ASSOCIATED WITH ZONE TEMP LIGHT CONTROL CABIN. PERFORMED QRH. LIGHT EXTINGUISHED WITH MASTER CAUTION RESET. ACFT GROUNDED. R & R CONTROL CABIN TRIM AIR MODULATING VALVE ASSY, OPS BITES GOOD IAW MM 21-61-21.