Two separate investigations will be launched into the accident at the Salthill Air Show in which three people were injured.
The Irish Aviation Authority and the British Ministry of Defence will investigate what happened when the door of a RAF helicopter fell off while the aircraft was airborne.
Two men and a woman suffered injuries when the door of the hovering aircraft flew off and fell into a large crowd below at yesterday's event.
The three were taken to University College Hospital in Galway and were discharged this morning.
