What was found
LEFT PACK LIGHT ON RECALL, RESET WITH MASTER CAUTION. ACFT GROUNDED. ACCOMPLISHED A BITE TEST, FOUND THE LEFT PACK TCV FAULT LIGHT, LIGHT WOULD NOT RESET, BITE TESTED THE RT CONTROLLER PASSED. REMOVED & REPLACED THE LT PACK TCV IAW AMM 21-51-10-000-801, AND 21-51-10-400-801. LEAK CHECKED GOOD. COMPLETED PACK/ZONE TEMPERATURE CONTROLLER BITE TEST, OPS CHECKED GOOD AND NO DEFECTS NOTED IAW AMM 21-51-00-700-803.