As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT PACK CAUTION LIGHT ILLUMINATES ON RECALL CANCELS W/ MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED BITE TEST OF NR 1 ZONE TEMP CONTROLLER REF AMM TASK 21-61-00-810-801. ZONE TEMP CONTROL INDICATES TCV FAILURE. REPLACED LT PACK TEMP CONTROL VALVE REF AMM 21-51-10. OPS CHK GOOD AND NO LEAKS FOUND.