As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 1205, MKE TO IND. AFTER CLIMBING THROUGH 1,500FT THE CREW RECEIVED A MASTER CAUTION BAGGAGE DOOR OPEN INDICATION. THE QRH WAS COMPLETED AND THE AIRCRAFT RETURNED TO MKE AND LANDED WITHOUT INCIDENT. THE BAGGAGE DOOR WAS CONFIRMED CLOSED AND LOCKED AND THE INDICATION WAS PLACED ON DEFERRAL. THE DEFERRAL WAS CLEARED ON 9/5/2009 IN IND WHEN THE FORWARD MICRO SWITCH WAS ADJUSTED AND THE INDICATION SYSTEM OPERATED NORMALLY.