Product Code:SAE ARP987 Title:The Control of Excess Humidity in Avionics Cooling Issuing Committee:Ac-9 Aircraft Environmental Systems Committee Scope:The purpose of this document is threefold: (1) to review the problem of moisture in avionics equipment, (2) to outline methods for correcting conditions of excess moisture in existing avionics installations, and (3) to recommend design practices for new avionics cooling system installations which will minimize the adverse effects of moisture.