Helicopters do not do well in icing conditions unless they have rotor blade heating. Ice accretion on rotor blades is damaging to lift in much smaller quantities than ice on a fixed wing.
Therefore helicopter pilots try very hard not take machines into actual, known or forcast icing conditions unless they have anti-ice systems.
I am not aware that the A109 has an option for anti-ice, this is normally seen on larger machines such as the A139. You could search through the Agusta Westland webste to check, if you are keen.
Last edited by John R81; 19th Jan 2013 at 18:14.