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usable in each tank (26 gallons total usable in all flight conditions).
Drain valves at the system low points allow draining the system for
maintenance and for examination of fuel in the system for
contamination and grade. The fuel must be sampled prior to each
flight. A sampler cup is provided to drain a small amount of fuel from
the wing tank drains, the collector tank drains, and the gascolator
drain. If takeoff weight limitations for the next flight permit, the fuel
tanks should be filled after each flight to prevent condensation.
• Note •
Serials 1268 and subsequent with optional EMax Engine
Monitoring after factory installation or after Service Bulletin SB
22-77-01: The following fuel system component descriptions
are the same as those listed for airplane serials 1582 and
subsequent except:
• MFD functionality is enhanced by displaying fuel used, fuel
remaining, time remaining, fuel economy, and the addition of
Initial Usable Fuel page.
Refer to Avidyne FlightMax EX5000C Pilot’s Guide for a more
complete description of the MFD, its operating modes, and additional
detailed operating procedures for the EMax option.
Fuel Selector Valve
A fuel selector valve, located at the rear of the center console,
provides the following functions:
• LEFT...................................Allows fuel to flow from the left tank
• RIGHT ............................ Allows fuel to flow from the right tank
• OFF ........................................Cuts off fuel flow from both tanks
The valve is arranged so that to feed off a particular tank the valve
should be pointed to the fuel indicator for that tank. To select RIGHT or
LEFT, rotate the selector to the desired position. To select Off, first
raise the fuel selector knob release and then rotate the knob to OFF.
March 2010
Information Manual 7-59
Cirrus Design Section 7
SR20 Airplane Description
Fuel Quantity Indicator
A dual reading 2¼” fuel quantity indicator is installed on the console
immediately forward of the fuel selector valve. The LEFT pointer
indicates left tank fuel quantity and sweeps a scale marked from 0 to
28 U.S. gallons in 2½-gallon increments. The RIGHT pointer sweeps
an identical scale for the right tank. Each scale is marked with a yellow
arc from 0 to 8.2 gallon. The indicators are calibrated to read ‘0’ when
no usable fuel remains. Each indicator also provides an output signal
to illuminate the FUEL caution light when the fuel quantity goes below
approximately 8-9 gallons in each tank. The indicator is internally
lighted. Serials 1268 through 1581: 28 VDC for fuel quantity system
operation is supplied through the 5-amp ENGINE INST circuit breaker
on Main Bus 1. Serials 1582 and subsequent: 28 VDC for fuel quantity
system operation is supplied through the 5-amp FUEL QTY / HOBBS
circuit breaker on Main Bus 1.
• Note •
When the fuel tanks are 1/4 full or less, prolonged
uncoordinated flight such as slips or skids can uncover the
fuel tank outlets. Therefore, if operating with one fuel tank dry
or if operating on LEFT or RIGHT tank when 1/4 full or less, do
not allow the airplane to remain in uncoordinated flight for
periods in excess of 30 seconds.
March 2010
7-60 Information Manual
Section 7 Cirrus Design
Airplane Description SR20
Figure 7-11
4
Serials 1005 thru 1581.
LEGEND
1. Fuel Pump Switch
2. Fuel Quantity Gage
3. Fuel Selector Valve
4. Fuel Flow
3
2
1
SR20_FM07_2225
Fuel System Controls and Indicating (Sheet 1 of 2)
March 2010
Information Manual 7-61
Cirrus Design Section 7
SR20 Airplane Description
FUEL
OIL
LOW VOLTS
PITOT HEAT
ALT 1
ALT 2
9
LEGEND
4. Fuel Flow
5. Fuel Used (EMax only)
6. Fuel Remaining (EMax only)
7. Time Remaining (EMax only)
8. Fuel Economy (EMax only)
9. Fuel Caution Light
Multifunction Display
Primary Flight Display 4
Annunciator
Panel
4
5
6
7
8
Serials 1582 & subs. SR20_FM07_2227
Figure 7-11
Fuel System Controls and Indicating (Sheet 2 of 2)
March 2010
7-62 Information Manual
Section 7 Cirrus Design
Airplane Description SR20
Fuel Flow Indication
Serials 1268 through 1581: Fuel flow indication is integral to the
combination Fuel Flow/Manifold Pressure Gage. Refer to preceding
discussion on Fuel Flow and Manifold Pressure Gage for complete
description of fuel flow indication.
Serials 1582 and subsequent: Fuel flow is shown as text in the fuel
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