is that landing three tonnes of helicopter on what are small wheels, it strikes me that on soft ground the helicopter could sink far enough to deform the wheel bay doors and cuase all sorts of havoc with the landing gear.
We had a Lynx(skids) land on sloping ground, which turned out to be quite soft. The downhill skid sank in to the ground, putting the aircraft out of sloping ground limits. Some considerable time digging under the uphill skid to get back in limits.