Complex sentence: Many of these incidents have involved Allegiant's MD80 aircraft, which are expected to be replaced by Airbus A320 family aircraft, however in March 2016 an Allegiant Air Airbus A320 was forced to make an emergency landing at Jacksonville.
Split into simpler sentences: Many of these incidents have involved Allegiant's MD80 aircraft, which are expected to be replaced by Airbus A320 family aircraft. In March 2016 an Allegiant Air Airbus A320 was forced to make an emergency landing at Jacksonville.