Worth pointing out that the FAA bought Boeing's claim that the 737 MAX 8, 9 did not require a new type certificate, and so did EASA. However, from what I gather

Worth pointing out that the FAA bought Boeing's claim that the 737 MAX 8, 9 did not require a new type certificate, and so did EASA. However, from what I gather, the Brazilian regulator deemed the MAX with MCAS sufficiently different from prior generations. The Brazilians required that Boeing document MCAS and include it in the required differences training. MCAS was considered a fairly small difference (if memory serves — "B") by the Brazilians and the MAX is still operating on the same type certificate. The big question in my mind is: why did the FAA not do the same?