This supplement forms a part of the Aerospace Standard AS4468, Hose Assembly, 125 psi, Lined Silicone, Potable Water, Procurement Specification. It shall be used to identify hose assembly standards that are governed by this procurement specification.
This Aerospace Standard covers three basic types of cargo compartment fire detector instruments. Basic Types - Definition of: Type I: Carbon Monoxide, an instrument which will actuate an alarm signal when the concentration of carbon monoxide in air exceeds a specified value. Type II: Smoke Detector, Electronic, an instrument operating on the principle of smoke particles modifying the relationship between a light beam and electronic light sensor which will actuate an alarm signal when the concentration of smoke in air exceeds a specified value. Type III: Smoke Detector, Visual, an instrument which, by visual means, will show in a positive manner the presence of smoke when the concentration of smoke in air exceeds a specified value.