What was found
AT 240 DESCENDING TO OAKLAND RECEIVED RED ECAM FOR AVIONICS SMOKE. REOCCURRED 3 TIMES. PER CREW DEBRIEF, CREW NEVER SMELLED SMOKE IN COCKPIT, NOR SMELLED SMOKE VIA SNIFFER TUBE. INSPECTED MIN EQUIP BAY, RT AND LT AVIONICS RACKS, NO EVIDENCE OF SMOKE/FIRE OR SMOKE ODORS. AVIONICS SMOKE LIGHT. DURING TROUBLESHOOTING, FOUND WATER DRIPPING ON SMOKE DETECTOR 11WA. REPLACED DETECTOR. REMOVED AND REPLACED 11WA SMOKE DETECTOR PER MM 26-15-12-4, ON MFG CGDU2000-00, SRL 5565 TAG 7A3346.