As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK LIGHT CAME ON WITH MASTER CAUTION RECALL. EXTINGUISHES WHEN MASTER CAUTION IS RESET. GROUNDED - YES. PERFORMED PACK TEMP CONTROL BITE TEST IAW B737-900 FIM 21-62 TASK 831. FOUND RH TCV FAULT. REMOVED AND REPLACED RH TCV IAW AMM 21-51-10 OPS CHECK GOOD , NO DEFECTS NOTED.