On Sunday, a new Ethiopian Airlines 737 MAX 8 went down minutes into a flight to Nairobi, killing all 157 people on board.
In October, a Lion Air jet of the same model crashed in Indonesia, killing 189.
The IAA said its decision Tuesday had been taken "in the light of the two fatal accidents involving the aircraft in recent months".
It was made also "based on ensuring the continued safety of passengers and flight crew, which is the IAA's number one priority", it added.
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