As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT CRUISE ALTITUDE ECAM INDICATION OF AVIONICS SMOKE. OPERATING THE SNIFFER FAN IAW QRH YIELDED NO SMOKE INDICATIONS. THE ECAM ALERT EXTINGUISHED AFTER 3 MINUTES. THE SITUATION REOCCURRED UPON LANDING. REPLACED AVIONICS SMOKE DETECTORS 11WA & 13WA.