![Boeing Chairman, President and CEO Dennis Muilenburg joined Boeing test pilots aboard a 737 MAX 7 flight for a demonstration of the updated MCAS software, April 3, 2019. (Photo/Agencies)](http://www.ecns.cn/hd/2019/04/04/495371d728f6451aaccf2eca7f6ef7fe.jpg)
Boeing Chairman, President and CEO Dennis Muilenburg joined Boeing test pilots aboard a 737 MAX 7 flight for a demonstration of the updated MCAS software, April 3, 2019. (Photo/Agencies)
![Boeing Chairman, President and CEO Dennis Muilenburg joined Boeing test pilots aboard a 737 MAX 7 flight for a demonstration of the updated MCAS software, April 3, 2019. (Photo/Agencies)](http://www.ecns.cn/hd/2019/04/04/02c046a764b9448f87087cc799f038a4.jpg)
Boeing Chairman, President and CEO Dennis Muilenburg joined Boeing test pilots aboard a 737 MAX 7 flight for a demonstration of the updated MCAS software, April 3, 2019. (Photo/Agencies)