Boeing CEO Dennis Muilenburg has sought to assure the public of the safety of the Boeing 737 MAX series of aircraft after several countries have grounded the 737 MAX 8 in response to the crash of an Ethiopian Airlines plane on Sunday, a second crash of the plane in five months.

An aviation expert who is also an official at the Indonesian Ombudsman demanded that the Indonesian government ground all Boeing 737 MAX 8 aircraft that were still operating for Indonesian airlines following a fatal crash of an Ethiopian Airlines flight on Sunday, which killed 149 passengers and eight crew members in a town 60 kilometers southeast of Ethiopian capital Addis Ababa.