Ladies and gentlemen, please forgive me for being out of the loop of aircraft maintenance and technology for a long time but is it not possible to introduce a simple sensing device into the nose-wheel system, like checking its weight when airborne for example, so that a missing nose-wheel can be detected on the flight deck? I appreciate this would be yet another expense and yet another warning for the flight crew but it does seem to me that the loss of a nose-wheel is a not uncommon occurrence.