What was found
ON CLIMBOUT RIGHT PACK LIGHT ILLUMINATED, STAYED ON ENTIRE FLIGHT WITH R PACK SWITCH IN OFF. GROUNDED - YES. CONFIRMED FAULT, RT PACK LT ON. R/H PACK/ZONE TEMP CONTROLLER BITE SHOWS HARD FAIL #2 TCV (V141). REMOVED & REPLACED #2 TCV REF B737-900 AMM 21-51-00. PULLED & RESET 3 TOTAL C/BS. ALSO, REMOVED ACCESS PANEL & INSPECTED BOTH PRIMARY & SECONDARY HEAT EXCHANGERS FOR DEBRIS & OBSTRUCTION REF FIM 21-53 TASK 820, NONE FOUND. RE-INSTALLED ACCESS PANEL. RAN R/H PACK WITH APU FOR 1 HOUR, WITH FLAPS EXTENDED & RETRACTED, GROUND FUNCTIONAL CHECK NML. INSPECTED GVI R/H PACK FOR ANY LEAKAGE, NONE FOUND. RE-ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE (BOTH L & R) REF AMM 21-61-00-700-806-002, OPS CK NML.