As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BITE OF LT PACK- ZONE TEMP CONTROLLER SHOWS FAULT FOR AFT ZONE TEMP CONTROL VALVE TRIM AIR VALVE. VERIFY TEST CONFIRMS FAULT. ACFT GROUNDED. R & R AND TESTED V145 AFT CABIN TRIM AIR VALVE IAW MM 21-61-21-000-801/MM 21-61-21-400-801. OPS NORMAL, NO LEAKS NOTED. PACK/ZONE TEMP CONTROLLER BITE IAW MM 21-61-00-700-806-002, SHOWS NO FAULTS.