Cirrus Design Section 7
SR22 Systems Description
P/N 13772-002 7-43P/N 13772-002 7-43
Serials 3849 and subs:
A dual reading fuel quantity gage is displayed on the Engine Strip
along the left edge of the MFD and in the Fuel Qty block of the
ENGINE page. In the case of an electronic display failure (backup
mode), all essential fuel information is displayed on the Engine Strip
along the left edge of the PFD. The LEFT pointer indicates left tank
fuel quantity and sweeps a vertical bar scale marked from 0 to 46 U.S.
gallons in 5-gallon increments. The RIGHT pointer sweeps an identical
scale for the right tank. Each scale is marked with a yellow band from
0 to 14 U.S. gallons and a green band from 14 to 46 U.S. gallons. The
indicators are calibrated to read 0 gallons when no usable fuel
remains.
Fuel quantity is measured by a float type quantity sensors installed in
the fuel tanks. Fluid quantity information is sent to the Engine Airframe
Unit, processed, and transmitted to the analog electronic Fuel Quantity
Gage and CAS window for display.
Fuel Flow
Fuel Flow is shown in the upper mid left corner of the Engine Strip as
both an analog electronic gage and as a digital value. The gage
pointer sweeps a scale range from 0 to 30 Gallons Per Hour (GPH).
The fuel flow value is displayed in white numerals below the gage.
Fuel flow is measured by a transducer on the right side of the engine
in the fuel line between the engine driven fuel pump and distribution
block. The fuel flow signal is sent to the Engine Airframe Unit,
processed, and transmitted to the Engine Indicating System for
display.
Fuel Totalizer and Calculated Information
Fuel totalizer calculations are located in the lower right section of the
ENGINE page and are separate and independent of the fuel quantity
gage and float sensor system. The fuel totalizer monitors fuel flow and
calculates fuel-to-destination, fuel used, fuel remaining, time
remaining, fuel range, and nautical miles per gallon. Upon system
startup, the fuel totalizer initial fuel screen appears and prompts the
user to enter the total fuel on board at start. The option to enter the
number of gallons added since last fuel fill and the ability to set fuel to
“Full” or to “Tabs” buttons is also available.
Reissue A
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