b407_toggle_ties.lua

if PLANE_ICAO == "B407" then
    dataref("InletCap", "Equip/InletCap", "writable")
    dataref("OutletCap", "Equip/OutletCap", "writable")
    dataref("PitotCap", "Equip/PitotCap", "writable")
    dataref("Tie0", "Equip/Tie0", "writable")
    dataref("Tie1", "Equip/Tie1", "writable")
    dataref("Tie2", "Equip/Tie2", "writable")
    dataref("Tie3", "Equip/Tie3", "writable")

    function toggle()
        if not button(17) and last_button(17) then
            InletCap = InletCap == 0 and 1 or 0
            OutletCap = OutletCap == 0 and 1 or 0
            PitotCap = PitotCap == 0 and 1 or 0
            Tie0 = Tie0 == 0 and 1 or 0
            Tie1 = Tie1 == 0 and 1 or 0
            Tie2 = Tie2 == 0 and 1 or 0
            Tie3 = Tie3 == 0 and 1 or 0
        end
    end

    do_every_frame("toggle()")
end