What is the proper procedure for a slope landing in helicopters with skid-type landing gear?

The correct procedure for a slope landing in helicopters with skid-type landing gear involves lowering the upslope skid to the ground before the downslope skid. This technique is essential for maintaining stability during the landing phase on an inclined surface. By first placing the upslope skid down, the pilot ensures that the center of gravity remains aligned and that the helicopter is securely positioned on the slope before the downslope skid touches down.

This method minimizes the risk of the helicopter rolling over or becoming unstable, which could occur if the downslope skid were lowered first, potentially leading to a loss of control or a ground loop. Additionally, landing in this fashion allows for a smoother transition onto the slope, protecting both the helicopter and its occupants.

The other choices, while related to helicopter operations, do not reflect the safest and most effective method for slope landings with skid-type landing gear.