What was found
CONTROLLER CAB ZONE TEMP LIGHT ILLUMINATED ON RECALL. ACFT GROUNDED. CONFIRMED FAULT, NR 2 PACK ZONE TEMP CONTROLLER BITE, REF AMM TASK 21-61-00-700-806-002 SHOWS FLIGHT DECK TCV FAIL. NR 1 PACK ZONE TEMP CONTROLLER SHOWS NO FAULTS. R & R FLIGHT DECK TCV, V143, REF AMM TASK 21-61-21, LEAK CHECK AND GROUND FUNCTIONAL TESTS NORMAL, REF FIM 21-61, TASK 861 AND AMM TASK 21-61-00.