As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE AND LEVEL AT 9000, GOT ECAM AND MASTER WARNING FOR AVIONICS SMOKE, DUE TO PROXIMITY TO AIRPORT IMMEDIATELY WENT ON OXYGEN TO RETURN TO KMEM. UNABLE TO CONFIRM ACTUAL SMOKE AND ON APPROACH ECAM ALERT CLEARED. REMOVED AND REPLACED AVI COMPARTMENT SMOKE DETECTOR 13WA AVIONICS COMPARTMENT AS PER MM 26-15-12-4. REPLACED AVIONICS COMP SMOKE DET'S 11WA AND 12WA PER A/C M/M 26-15-12-4, AVIONICS COMP SMOKE DET SYS. TESTS OK PER A/C M/M 26-15-00-5.