As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 921 - PHL-MJB - BURNING SMELL - AVIONICS SMOKE ECAM MESSAGE, SMELL OF LIGHT SMOKE IN COCKPIT. CLT MAINTENANCE REMOVED AND REPLACED THE AVIONICS EQUIPMENT VENTILATION COMPUTER AND SMOKE DETECTOR. ECAM MESSAGE CLEARED AND NO FURTHER SMELL OF SMOKE IN THE COCKPIT.