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66. The EDM 930 provides a range of visual alerts that will bring important information to
the attention of the pilot. The EDM 930 provides Primary and Secondary Alerts as detailed
below:
a. Primary Alerts. These are alerts that indicate imminent or actual exceedance of
a published engine or system limitation. When a measurement falls outside a
programmed limit, the main display will blink ALERT in red and the parameter will
appear on the display and the RAD:
Oil Temperature Out of Limits
Oil Pressure Out of Limits
Over-Boost Manifold Pressure
Battery Voltage Out of Limits
Current Flow Out of Limits
Figure 1-44 Primary Alerts
b. Secondary Alerts. These are Alerts that indicate important operational
information not related to a published engine or system limitation. When a
measurement falls outside a programmed caution point, the main display will blink
ALERT in amber and the measurement will appear in the scanner display:
Low Fuel Endurance Remaining
Low Fuel Quantity Remaining
Excessive CHT Cooling Rate
Fuel Level Out Of Balance
Figure 1-45 Secondary Alerts
67. Alerts issued by the EDM 930 are of a cautionary nature. They are intended to enhance
the pilot’s situational awareness and to draw his / her attention to specific aircraft parameters
that may be of concern. As such, it is critical not to become distracted by an alert. It is most
important to maintain control of the aircraft, and then deal with the alert when it is safe to do so.
Alerts should be handled as a non-critical emergency in accordance with Part 3 – Emergency
Procedures.
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