As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. FLT 340 FLIGHT CREW HEARD A AIR NOISE IN COCKPIT FOLLOWED BY SMOKE COMING FROM RIGHT SIDE OF COCKPIT. EXTRACT BLOWER FANS WENT OFF. ECAM MESSAGES APPEARED LANDED ASAP. EMERGENCY WAS DECLARED. REPLACED THE EXTRACT FAN AND EXTRACT SMOKE DETECTOR IAW AMM 21-26-51 AND 26-15-15. AVIONICS VENT FILTER ALSO REPLACED IAW AMM 21-26-43.