As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - FLT 5217 - FLIGHT ATTENDANT REPORTED SMOKE SMELL IN THE CABIN. SMELL COULD ALSO BE DETECTED IN THE COCKPIT. THE AIRCRAFT RETURNED TO THE GATE AND WAS DEPLANED. REMOVED AND REPLACED THE RIGHT AIR CYCLE MACHINE SYSTEM IAW AMM. OPS CHECK GOOD. AIRCRAFT RETURN TO SERVICE. (M)