Introduction
An Environmental Control System (ECS) provides temperature, humidity, ventilation and pressure control to passenger/cargo areas, aircraft systems and equipment. The system must be able to provide this control under any possible role, configuration and environment in which the aircraft will operate. ECS air may be derived from internal sources (engine or auxiliary power unit), external sources (ram air or air-conditioning cart) or an ECS dedicated compressor. Heat generated by aircraft equipment and occupants is usually dispersed external to the aircraft and needs to be controlled to meet safety and mission requirements. ECS functions and sub-systems may include, but are not limited to: pressurisation, heating, cooling, ventilation, moisture control, pressure and anti-G suit control, defogging, defrosting, anti-icing, rain removal, windshield washing, and electronic and electrical thermal management. For further information on ECS contact DASA DTS Enquiries.