Any of the newly engined Max models are involved, even the Max 8 and 9. The problem with the de-icing mechanism was only found _after_ the 8 and 9 were certified so they've been allowed to continue flying with the "pilot fix" in place (this is ludicrous btw).

The Max 7 is being blocked currently because it hasn't been certified yet.

That's what I thought, thanks. As you note, the "solution" is absurd, and insulting and offensive. The older models should be pulled too. WTF.