Eclipse 500 System Manual page 147

Section 7. Fuel Eclipse 5OO Systems Manual
On the ground the inboard gauging probes also determine the presence of AVGAS.
The ACS detects the presence of AVGAS by comparing the fuel di-electric property
with standard di-electric curves for Jet-A and AVGAS. An AVGAS DETECTED
warning message appears at an AVGAS concentration of approximately 80%. Amber
AVGAS text also is displayed below the total fuel quantity display on the fuel
synoptic.
NOTE:
Operation with AVGAS is prohibited.
A FUEL QTY LOW caution message appears when the gauging system determines
fuel in either sump tank is 140 pounds or less. In this case, the respective sump tank
quantity on the fuel synoptic turns amber.
Optical sensors in both sump tanks serve as a backup for the fuel gauging system. If
either sump tank fuel quantity decreases to 105 pounds useable fuel, the optical
sensor in that tank triggers a L (R) FUEL QTY LOW warning message. In this case,
the respective sump tank quantity on the fuel synoptic turns red. The low level
sensors are independent of the fuel gauging system and monitored by the opposite
ACS for further independence.
Figure 82. Fuel Synoptic- Low Fuel Caution and Warning
In the event the most inboard sump probe is not completely submerged in fuel the
electric fuel pump automatically turns on. If this probe fails, the electric fuel pump will
turn on when the low level sensor is activated and remains on for the duration of the
flight. Activating the electric fuel pump in these situations assures that adequate fuel
flow will be available with low fuel quantities.
Should a capacitance probe fail a FUEL GAUGING FAULT advisory message
appears and white FUEL GAUGING FAULT text appearing above the affected white
wing outline on the fuel synoptic.
Copyright © — Eclipse Aviation Corporation
Version 2.0 April 2007
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