> and it became clear that the 737 MAX had some serious design problems that they had tried to fix in software. It could be argued it was an appropriate design

> and it became clear that the 737 MAX had some serious design problems that they had tried to fix in software. It could be argued it was an appropriate design. The critical error was in that 737 MAX has two angle of attack sensors that feed data into the cockpit; however, the MCAS software only used input from one of them. In the Lion air case the one considered sensor had been improperly calibrated after being flagged for maintenance by the crew. The fix is fairly comprehensive. If an angle of attack disagree occurs between the two sensors the system is inhibited from activation. > Why are airlines so eager to buy such a compromised model from a company that destroyed its reputation? They don't see it as compromised. The purchase price was set based on the fact that airlines would _not_ need to retrain existing 737 pilots for the new model, that it was type equivalent. With the software changes and with additional training there are cost implications but not necessarily safety considerations with the model.