On a different note, Indian airline SpiceJet jumped to the defence of the Boeing 737 MAX on Tuesday even as other countries grounded the aircraft following the Ethiopian Airlines crash.
"The Boeing 737 MAX is a highly sophisticated aircraft," SpiceJet, which has 13 B-737 MAX 8 planes in its 75-aircraft fleet, said in a statement.
"It has flown hundreds of thousands of hours globally and some of the world's largest airlines are flying this aircraft," it added.
South Korea on Tuesday became the most recent country to suspend operations of the Boeing 737 MAX 8, following Singapore, China and Indonesia.
Australia barred all 737 MAX planes from its airspace, while US authorities ordered Boeing to improve anti-stalling software and the model's manoeuvring system.
On Sunday an Ethiopian Airlines Boeing 737 MAX 8 went down minutes into a flight to Nairobi, killing all 157 people on board. It came after a Lion Air jet of the same model crashed in Indonesia in October, killing 189.
On Monday, India's aviation regulator said it imposed additional "interim" safety requirements for ground engineers and crew regarding the aircraft but stopped short of ordering their grounding.