As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RSW CREW REPORTED ELECTRICAL ODOR IN AFT CABIN. EMERGENCY DECLARED, FLIGHT RETURNED RSW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND SEVERAL LEAKS IN AUXILIARY POWER UNIT BLEED DUCT IN AFT CARGO. REPLACED DUCT AT STATION 1520. SYSTEM GROUND CHECKED NORMAL OPERATION CLOSED.