What was found
WHILE CLIMBING THROUGH 13,000FT THE CREW REPORTED A BAGG SMOKE MESSAGE ON EICAS. THE CREW FOLLOWED THE QRH AND DISCHARGED THE BAGGAGE FIRE EXTINGUISHERS AND PREPARED TO RETURN TO MKE. THE FLIGHT ATTENDANT CHECKED THE BAGGAGE COMPARTMENT PEEP HOLE AND REPORTED THAT THERE WERE NO SIGNS OF SMOKE OR FIRE IN THE BAGGAGE COMPARTMENT. THE AIRCRAFT LANDED BACK A MKE WITHOUT INCIDENT AND WAS INSPECTED BY FIRE CREWS WITH NO SIGNS OF FIRE OR SMOKE NOTED. MAINTENANCE INSPECTED THE BAGGAGE SMOKE DETECTION SYSTEM AND FOUND PIN 5 IN THE CONNECTOR (P2615) FOR THE FORWARD SMOKE DETECTOR BROKEN OFF AND STUCK INSIDE THE PLUG. THE CONNECTOR WAS REPLACED ALONG WITH THE FORWARD SMOKE DETECTOR AND NO FURTHER DEFECTS WERE NOTED.