As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO CONTROL FLIGHT DECK TEMP. SUPPLY DUCT REMAINED AT 52. ACFT GROUNDED. PERFORMED PACK/ZONE TEMP CONTROL BITE TEST, NO FAULTS BITE TEST PASSED. PERFORMED AIR CONDITION TEMP CONTROL, OPS CHECK IAW AMM 21-60-00-804. SYS OPS NORMAL.