As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTINUED LOUD HUMMING NOISE IN COCKPIT WITH SUBSEQUENT ELECTRICAL ODOR. AVIONICS EXTRACT FAN FAULT DISPLAYED, NOISE STOPPED. REPLACED AVIONICS EXTRACT FAN. AEVC OPS CHECK NORMAL. NO FAULTS NOTED, ALL ECAM CLEAR. SMOKE ODOR HAS DISSIPATED.