As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK LIGHT WAS ILLUMINATED AFTER TAKEOFF. PACK LIGHT EXTINGUISHES WHEN MASTER CAUTION RESET IS PUSHED. GROUNDED - YES. PERFORMED RT PACK ZONE TEMP CONTROLLER BITE AND FOUND TCV FAULT IN VERIFY ONLY, REF AMM 21-51-00. REMOVED AND REPLACED RT PACK TEMP CONTROL VALVE, REF AMM 21-51-10. INSTALLATION TEST, LEAK CHECK, AND BITE TEST GOOD. NO NEW FAULTS. ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL.