Such a terrible business decision considering the crashes and their impact on Boeing's reputation. If you think a feature will keep the product from catastrophic failure, it should be standard on every unit you sell.

I believe it goes like this:

    Boeing: Do you want a two line code which triggers a potentially life-saving warning when your flying sausage with wings has an important sensor malfunction?
    Customer: Of course!
    Boeing: That'll be $25K, thanks.

It's what happens when you load a company up with MBA grads who only know cookie cutter business plans with no actual business acumen or experience.