Rwanda has joined a number of countries across the world that has banned Boeing 787 Max 8 and Max 9 from flying over its airspace.
But in the meantime, the 737 MAX jets that had been in service will remain grounded indefinitely - all 371 of them.
Ethiopian Airlines had said it would work with Boeing, the national civil aviation authority and worldwide experts in trying to unravel what caused the brand new plane to come down just six minutes into its flight.
Two sources familiar with the matter said crash site investigators found a piece of a stabiliser used to set the airplane's trim that was in an unusual position similar to that of the Lion Air plane at the time of its crash.
The deadly crash of an Ethiopian Airlines plane on Sunday is having a ripple effect across aviation.
The causes of both crashes are still under investigation.
No Japanese airline operates the Boeing 737 MAX series aircraft at present. McCallum said if a safety mechanism is suspect in either case, training to disable it is not a long-term fix.
"I think most aviation experts will tell you that since we have automated aircraft, since the dawn of automation, safety has improved dramatically and while they are more complex they are definitely safer", said Elwell. That includes cockpit displays, flight controls, navigation systems, weather radar, communications systems and collision avoidance systems, many of which work with or include auto-pilot systems, according to Collins Aerospace's website.
Japan Airlines Co. has no plans to acquire the 737 Max 8.