Planemaker Airbus (AIR.PA) hinted at further production increases in its popular A320 series on Thursday, saying market demand would justify a leap to “more than 60 aircraft” a month. Sales chief John Leahy said anticipated demand already exceeded the planemaker’s existing production goal of 50 planes a month and that Airbus was studying further increases. Airbus currently produces 42 of the medium-haul planes a month and has already set an output goal of 50 a month by the first quarter of 2017.