Boeing’s new 737 MAX 8 twin-engine jet airliner doesn’t seem to be flying so good: another crashed today, the second in just four months, raising suspicion something may be wrong with the plane. Controversy from pilots regarding the last incident, Lion Air flight 610, suggests the aircraft’s autonomy could be a significant risk factor. The new plane automatically compensates if it believes its angle puts it at a risk of stalling, a safety feature that worked in a slightly different way to that which 737 pilots were used to. Lion Air’s black box suggested the pilots of flight 610 had been wrestling with this issue. Boeing argued that if pilots followed existing procedures, there should be no danger.