What was found
DURING RETRACTION OF GEAR THE FLT ATTENDS REPORTED SMOKE IN THE FUSELAGE WITH A RUBBER SMELL, THE SMOKE QUICKLY DISSIPATED. PILOT VERBAL APU WAS NOT RUNNING, INSPECTED APU INLET, NO CONTAMINATION NOTED. INSPECT, APU OIL CAP SECURE. INSPECT BOTH ENG INLETS AND OIL CAPS, ALL CLEAR AND SECURE. INSPECT BRAKES AND WHEEL WELLS, ALL CHECKS GOOD. PERFORMED OPN 5090, ALTN DUCT BURNOUT PERFORMED.