Boeing dominated the commercial passenger aircraft market for a long time, but has lost its title as the world's biggest planemaker to Airbus because it's making headlines for all the wrong reasons.

Michael O'Leary said every new Boeing jet delivered to them undergoes stringent safety checks before joining their fleet.

Police also conducted a detailed background check of the ground staff as well as a list of “usual suspects and past accused” to rule out any possibility of sabotage.