Sultan, why can't a 139 land on soft surfaces or pontoon pads? For soft surfaces, use the slump pad kit. Can't retract the gear, but that only restricts you to 150 knots, a speed that any 412 can only dream of, downhill! So why can't they land on pontoon pads? I'm sure Seahawks/Blackhawks and other wheeled helicopters can. The 139 is very stable on its landing gear, so what exactly is the problem? Perhaps the pontoons are only rated for 'light' helicopters?