What was found
ON MASTER CAUTION RECALL AFTER START RIGHT HAND PACK LIGHT ILLUMINATED ,RESET WITH MASTER CAUTION RESET. GROUNDED - YES. INITIAL EVALUATION, RH PACK LT ON MASTER RECALL AT OVERHEAD. PERFORMED PZTC BITE IAW B737-800 FIM 21-62 TASK 801. PZTC #2 HAD TCV RED LT ON BIT, CLEARED GREEN ON VERIFY. OBSERVED RH PACK TCV MOVE AT TEST. SOUNDS SAME AS LEFT. RAN BOTH PACKS PER B737-800 AMM 21-61-00-700-807-002, BOTH PACKS RAN FULL WARM/FULL COLD TOGETHER AND INDEPENDENTLY 10-15 MINS, NO FAULTS. RH PACK LT NO LONGER PRESENT AT P5 OVERHEAD. NO A/C HISTORY FOR THIS DEFECT.