What was found
NUMEROUS INSTANCES OF LOOSE RIVETS, AND CRACKS ON AIRFRAME WITH APPROXIMATELY 8 INCHES RADIUS OF LOWER FORWARD CORNER OF NOSE BAGGAGE DOOR. SUBMITTER HAS SEEN SEVERAL FIELD REPAIRS, USUALLY A DOUBLER/PATCH ON NOSE PORTION OF AIRFRAME. MOST PREVALENT ON OLD AIRPLANES OPERATED UNDER FAR 135.