What was found
RIGHT PACK LIGHT CAME ON DURING RECALL IN CLIMB OUT. PACK LIGHT EXTINGUISHED WITH MASTER CAUTION RESET. GROUNDED - YES. (RESOLVED ON W/O: 1886727 TASKCARD: N/R-00002 ) CONFIRMED RIGHT PACK LIGHT ON RECALL, PZTC BITE SHOWS TCV ON BIT AND PREV FLT, EXTINGUISHES ON VERIFY. DUE TO 4 OCCURRENCES IN 5 MONTHS WITH NO MAINTENANCE ACTIONS, REMOVED AND REPLACED RH PACK TCV, REF B737-900 AMM 21-51-10. OP CHECK GOOD. LEAK CHECK GOOD. ETOPS GROUND VERIFICATION SUCCESSFUL. THIS CLEARS MEL 21-32B, CN 22006483. PLACARDS REMOVED SEA MC TODD NOTIFIED.