What was found
INSPECTION TYPE:N/A ATB - AFTER ROTATION, MASTER WARNING LIGHT ALONG WITH BELLY DOOR ILLUMINATED. THE TOWER WAS INFORMED, RETURN FOR LANDING. LANDED IN THE SAME PATTERN WITHOUT ANY PROBLEMS AND TAXIED TO THE RAMP. OPENED AND CLOSED FWD BELLY DOOR, PIT 32, LIGHT WENT OUT. PUSHED ON DOOR TO ENSURE LOCKED.