As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ON DURING TAXI. EXTINGUISHED WHEN MC RECALL. ACFT GROUNDED. NR 1 TEMP CONTROL UNIT SHOWED TCV FAULT. PERFORMED AMM 21-61-00-700-806-002, NO DEFECTS NOTED. RESET TEMP CONTROL UNIT, AN BITE TEST THREE MORE TIMES, NO DEFECTS NOTED.