13.8.1-2 Appropriate Use of Alarms

If critical equipment is not regularly monitored, an alarm should be provided to indicate malfunctions or conditions that would cause personnel injury or equipment damage.

Additional Information:
The alarm may be auditory, visual, or both. If an auditory alarm would be overly intrusive or disruptive, the alarm should be visual. A combination of auditory and visual alarms should be provided when the ambient illumination may impair the maintainer's ability to see the latter. A high degree of ambient illumination may cause visual glare, affecting the detection of light-emitting alarms. A low degree of ambient illumination may interfere with their ability to detect and read alarms on light- reflecting displays.