> It's worse than that, as I understand it a professional airline pilot can only remain type-certified in a single type rating at one time. That's not my under

> It's worse than that, as I understand it a professional airline pilot can only remain type-certified in a single type rating at one time. That's not my understanding: I think you can simultaneously be certified for multiple planes, however companies will only make you fly for one at a time, currently. My guess is that if the Max needs a new certification, it will create a whole new model given it is still really close to the NG (and basic 737, if they still fly), so it might be more convenient than risky (and costly) to allow pilots to be certified and fly on both, if really needed. Maybe this will not even be needed, because tons of companies use multiple types of aircraft already.