1. SCOPE:

This Aerospace Standard covers three basic types of cargo compartment fire detector instruments.

1.1 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.

1.2 Purpose:

This Aerospace Standard establishes the essential minimum safe performance standards for cargo compartment fire detector instruments primarily for use with reciprocating engine-powered transport aircraft, the operation of which may subject the instruments to the environmental conditions specified in Section 3.3.