As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER GETTING AIRBORNE, THE FLIGHT CREW RECEIVED AN AVIONICS SMOKE MESSAGE ON ECAM. THE AIRCRAFT DIVERTED BACK TO POINT OF DEPARTURE. AS A PRECAUTION, LOCAL CFR WAS CALLED OUT BY THE AIRPORT AUTHORITY. THERE WAS NO ADVERSE PASSENGER REACTION. REPLACED SKIN EXCHANGER ISOLATION VALVE 24HQ PER AMM 21-26-55-401. AEVC OPERATIONAL CHECK ACCOMPLISHED PER AMM 21-26-00-710-001. NO AEVC OR AVIONIC SMOKE FAULTS DISPLAYED ON ECAM. CONSIDERED SERVICEABLE.