What was found
PILOT RECEIVED A REQUEST FOR A BABY FLIGHT. THE CREWMEMBERS AND PILOT PROCEEDED TO THE AIRCRAFT TO REPOSITION DOWNTOWN SO THEY COULD PICKUP THE CHILDREN'S TEAM. UPON TAKEOFF AT 11:02 A CREWMEMBER IN THE AFT CABIN ANNOUNCED SHE SMELLED SOMETHING BURNING. ALL COCKPIT INSTRUMENT INDICATIONS WERE NORMAL. AS THE AIRCRAFT WAS TURNED TO RETURN TO BASE THE ODOR BECAME STRONGER TO THE PILOT. AIRCRAFT WAS LANDED AT BASE WITH NO FURTHER PROBLEMS. AIRCRAFT TAKEN OUT OF SERVICE AND MAINT WAS CALLED. MAINTENANCE WAS UNABLE TO LOCATE THE SOURCE OF THE FUMES/SMELL, OR TO DUPLICATE THEM. AIRCRAFT RETURNED TO SERVICE.