What was found
RIGHT PACK LIGHT ILLUMINATED ON RECALL, RESETS WITH MASTER CAUTION RESET. GROUNDED - YES. INITIAL EVALUATION, NO LIGHT ON RECALL. PERFORMED PZTC BITE IAW B737-900 FIM 21-62 TASK 801, NO FAULT ON BIT, RED LIGHT FOR SRADA EXHAUST ON PREV FLT, CLEARED ON VERIFY. RAN BOTH PACKS 15-20 MINS, NO FAULTS, NO LIGHTS. A/C OK FOR SERVICE.