Labour Minister Seamus O'Regan has imposed final binding arbitration on WestJet and the Aircraft Mechanics Fraternal Association (AMFA), averting a strike of the airline's mechanics, but not before dozens of flights were cancelled in anticipation of job action. Heather Yourex-West explains how AMFA is reacting to O'Regan's order; what affected WestJet passengers are entitled to; and whether the airline is expected to ground more flights.