Investigation and response
The pilot and co-pilot were questioned in France and have been authorised to leave French territory following their interviews. Coutin said the investigation is ongoing and aims to establish whether the request to land was refused and "whether this behaviour was likely to constitute one or more criminal offences".
The aircraft's black box is to be examined as part of the investigation. Passengers were disembarked at Évreux and their baggage was searched; no explosives were found.
Aer Lingus said in a statement: "The captain and crew on Aer Lingus flight EI402 acted impeccably and were thoroughly professional throughout yesterday's security issue. Safety and the care of our passengers is Aer Lingus' top priority and this was upheld professionally by the captain and crew of the aircraft throughout in what were very challenging circumstances."
The Irish Airline Pilots Association said the questioning was generally standard procedure and that the pilots cooperated fully with French authorities. Union president Captain Daniel Langan said Ialpa was "fully satisfied that the pilots discharged their legal and safety responsibilities to the fullest extent and acted professionally throughout."