The development of Boeing's 737 MAX jets is reportedly being investigated by US prosecutors and the country's department of transport.
The MAX 8 and MAX 9 models have been grounded worldwide after two fatal crashes in under five months.
The most recent tragedy came on 10 March when an Ethiopian Airlines jet came down ‑ killing 157 people.
According to Reuters, the US Justice Department is investigating how Boeing has been regulated by the US airline authority, the Federal Aviation Administration.
The department of transport is also said to be looking at the Federal Aviation Administration's oversight of the plane manufacturer, as well as its development of the 737 MAX.
[Source: SkyNews]
