Ryanair is not planning to make any changes to the delivery of its first Boeing 737 MAX airplane next month in light of the crash of an Ethiopian Airlines jet, chief executive Michael O'Leary has said. 

China and Indonesia grounded their fleets of Boeing's 737 MAX 8 aircraft after the fatal crash. 

Ryanair has ordered 135 of the 737 MAX 200 planes, a modified version of the MAX 8, and has options on 75 more. 

"We wouldn't take any action at the moment," Michael O'Leary said. 

"We need to wait and see what the outcome of the investigation will be," he added. 

Ryanair is due to take delivery of the first 737 MAX in April, two in May and two in June. 

It will then take 50 more deliveries before the 2020 summer season. 

Michael O'Leary said he was "not particularly" concerned about the crash and that he expected the investigation into the crash to have been completed before the first delivery is made.