What was found
R PACK LT ILLUMINATED ON RECALL. GROUNDED - YES. C/W BITE PROCEDURE B737-800 FIM 21-62-TASK 801 FOR LEFT AND RIGHT PACK / ZONE TEMPERATURE CONTROLLERS, R PACK TCV LIGHT ON PREV FLT, GREEN ON VERIFY AND RESET. C/W FIM 21-62 TASK 831 RIGHT PZTC-2 RESET. FOUND DIRTY CABIN SENSOR FILTERS, REPLACED FILTERS & PERFORMED CABIN TEMPERATURE CONTROL AND INDICATION TEST REF B737-800 AMM TASK 21-61-00-700-807-002. OPS TEST GOOD. PACK LIGHT DOESN'T ILLUMINATE DURING MASTER CAUTION RECALL.