The Canso amphibian departed on a transportation flight to Torbay. On its return at 21:55, while landing, it crashed and sank immediately. From the 12 occupants of the aircraft, five survived, having been only slightly injured. All the others are missing and presumed to have been killed. CAUSE: Although the cause must remain obscure, it is indicated by the evidence that the aircraft may have touched down at a slightly excessive speed for the load condition therefore permitting a water-loop to develop with the possibility of wrenching the nosewheel door thus permitting a sudden surge of water into the nosewheel tank which in turn could burst through into the pilot’s compartment and the navigator’s compartment, thereby causing a very sudden flooding of the whole forward portion of the aircraft.