As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3125 - DIV - TO JAX DUE TO A METALLIC SMELL OF UNKNOWN SOURCE THROUGHOUT THE CABIN. CREW DONNED OXYGEN MASKS AND DECLARED AN EMERGENCY INTO JAX. AIRCRAFT WAS OPERATING ON A SINGLE PACK MEL. CORRECTIVE ACTION: COMPLIED WITH NO GO ODI. REMOVED AND REPLACED RIGHT CABIN RECIRCULATION FAN PER A319 AMM 21-21. (7351088)