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 certifie

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.