What was found
(CAN) NORMAL TAKEOFF, LANDING EXCESSIVE LT MOVEMENT OF ACFT, NEARLY LOST CONTROL, SHUTDOWN RUNWAY. FLAT TIRE, TUBE INSPECTED AND FOUND SMALL DEFECT IN RUBBER IN WHICH DEPENDING ON POSITION OF TUBE ALLOWED AIR TO LEAK, NEAT DEFECT. NO ACTION TO DATE BY TRANSPORT CANADA, SUPPLIERS AND MFG.