Several airlines have grounded the 737 MAX 8 in their fleets, but many others are continuing to fly the plane pending an investigation into the crash and possible guidance from Boeing itself.
A number of countries have banned Boeing's 737 MAX 8 medium-haul workhorse jet from their airspace in response to the Ethiopian Airlines crash that killed all 157 people on board.
Airlines still operating the model have been restricted by the airspace bans.
Other countries and airlines have opted to ground the planes pending the outcome of the Ethiopian Airlines investigation.
The Nairobi-bound plane was the same type as the Indonesian Lion Air jet that crashed in October, killing 189 passengers and crew, and some officials have detected similarities between the two accidents.
More than 370 737 MAX 8s are in service around the world, with nearly 5,000 on order.
Analysis of black boxes
Also on Wednesday, Ethiopian Airlines said it will send the two black boxes from Sunday's deadly crash to Europe for analysis, an airline spokesman said.
"We are going to send it to Europe, but the country is not specified yet," Asrat Begashaw told AFP news agency.
"We didn't pick the specific country."
The airline earlier said Ethiopia did not have the equipment to analyse the black box data.
Meanwhile, the US federal aviation administration says there's no reason to ground them until the cause of the crash has been determined. TRT World's Philip Owira reports.
Countries that banned the model from flying in its airspace:
United Arab Emirates
All European Union countries
Airlines that grounded the model:
MIAT Mongolian Airlines
Norwegian Air Shuttle