A maintenance staircase for carrying out inspection and maintenance work on aircraft. A special feature is the railings that can be swiveled down and are equipped with locking bolts. These hinged railings also include sliding railings. A safety door is integrated in the hinged and sliding railing. There is also a folding staircase with 2 steps in the upper platform. The material which is used Aluminum Alloy. Manufactured in accordance with the applicable regulations and guidelines.