The present discloses a system for washing and de-icing of aircrafts. The preset invention provides a hangar comprising three gantries to ensure different steps of the washing or the de-icing process. The structure of the gantries is essentially made of telescopic arms allowing more flexibility on the positioning of nozzle clusters during the washing and de-icing process. The use of such a mechanical system is easily accommodated to different aircraft bodies regardless their sizes. The whole functionality and positioning of the system is ensured by a programmable system.