As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3307 THE CREW REPORTED THAT ON FINAL APPROACH THEY NOTICED STRONG ELECTRICAL FUMES IN THE COCKPIT. THE CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. FOUND ELECTRICAL SMELL COMING FROM AUTOFLIGHT GUIDANCE CONTROLLER. REMOVED AND REPLACED THE AUTOFLIGHT GUIDANCE CONTROLLER IAW AMM 22-11-01. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.