As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3693 THE CREW REPORTED A LOUD WHIRRING NOISE THAT BEGAN AT 3000 FEET ON FINAL TO MIA FOLLOWED BY A HOT ELECTRIC WIRING ACRID ODOR DURING THE REMAINDER OF FLIGHT. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND INSTALLED ATTITUDE HEADING REFERENCE SYSTEM NR 2 FAN IAW EMB 145 AMM 34-21-03. THE OPERATIONAL CHECK WAS GOOD NO FAULTS NOTED.