The Boeing 737 Max-8 aircraft that crashed on SundayImage copyrightJonathan Druion

Ethiopian Airlines flight 302 crashed on Sunday morning killing all 157 people on board.

It’s led to a serious crisis for Boeing. The company manufactured the 737 Max 8 plane that was involved. The model has now been grounded globally as the pressure mounts in a search for answers.

Current estimates of the number of 737 Max 8 and 9s grounded ranges from 350 to 370. That represents a significant cost for airlines using the plane as routes, schedules and passengers are affected.

The race is on for investigators to find answers – and fast.

What do we know?

The flight data recorder (FDR) and cockpit voice recorder (CVR), or black boxes as they are often called, arrived in France on Thursday morning for inspection by the Bureau of Enquiry and Analysis for Civil Aviation Safety (BEA), the French version of the UK’s Air Accident Investigation Branch.