What was found
RIGHT PACK CAUTION LIGHT ILLUMINATED WITH MASTER RECALL. LIGHT EXTINGUISHED WITH MASTER CAUTION RESET. GROUNDED-YES. PACK ZONE TEMP CONTROL BITE, PER B737-800 FIM 21-62 TASK 801 SHOWED FAULT ON RIGHT PZTC FOR RIGHT PACK TCV ON BIT AND PREV FLT. ACCOMPLISHED T/S FOR RIGHT PACK TCV FAULT, PER FIM 21-62 TASK 830-INITIAL EVALUATION (PZTC VERIFY TEST) DID NOT CONFIRM FAULT-VERIFY TEST PASSED AND FAULT RESET. OPERATED PACK AND VERIFIED OPERATION OF PACK TCV AND PERFORMED PZTC BITE, PER FIM 21-62 TASK 801, ALL TESTS PASS.