>"After the Lion Air event, Southwest was notified by Boeing that the AOA disagree lights were inoperable without the optional AOA indicators on the MAX aircraf

>"After the Lion Air event, Southwest was notified by Boeing that the AOA disagree lights were inoperable without the optional AOA indicators on the MAX aircraft," a Southwest spokesman said on Tuesday. … >However, the company said following software modifications all new 737 MAX aircraft would have an activated and operable disagree alert and an optional angle-of-attack indicator, while current 737 MAX planes would have the ability to activate the disagree alert.