xetroV
You are correct in saying one way to fix the problem of putting the zfw into the gw field in the fmc is simply to block any data entry whilst on the ground, but why is it an expensive option?
My company did just that shortly after a tailscrape incident a few years back, anyway the cost of having that mod done to the fmc software has got to be a hell of a lot cheaper then repairing an a/c or worse still losing one.