As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 PACK TEMP CONTROLLER BITE CHECK SHOWS STANDBY RIGHT TCV, V142, FAULTED. ACFT GROUNDED. REMOVED AND REPLACED THE RIGHT STANDBY TCV IAW AMM TASK 21-51-11-000-801, AND 21-51-11-400-801. PERFORMED STANDBY TCV INSTALLATION TEST IAW AMM 21-51-11-400-801, ITEM G, (1 THRU 16). ITEM G - 7 TEMP ZONE CONTROLLER TEST GOOD. OPS AND LEAK CHECKED GOOD.