Just out of interest, I was thinking about the evils that befall these aeroplanes when pilots and engineers aren't present, and the bizarre towing practices we see. For example, there has been a spate for some years of A32* nosewheel steering failures and landings with 90 degree nosewheel deflection. Any connection with overstressing on towing/pushback? I get surprised sometimes by violent pushes where you wonder whether the tug even has a clutch, or why it is so harsh, and that used to be on a 747! What hope little ones!