As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK CAUTION LIGHT ILLUMINATED ON TAXI OUT WHEN PUSHING MASTER CAUTION RECALL. EXTINGUISHED WITH MASTER CAUTION (PUSH TO RESET). GROUNDED - YES. REMOVED AND REPLACED RT TEMPERATURE CONTROL VALVE IAW AMM 21-51-10-000-801 AND AMM 21-51-10-400-801, ETOPS GROUND FUNCTIONAL CHECK GOOD IAW AMM 21-61-00-700-806-002 AND LEAK CHECK GOOD.