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“Monitor Oil Temperature” in a red advisory box in the lower right
corner of the MFD.
In the event oil temperature exceeds 240°F, the MFD will display
“Check Oil Temp” in a red advisory box in the lower right corner of the
MFD.
Oil pressure is shown in the upper right-most corner of the MFD as
both a simulated pressure gage and as text. The simulated gage
receives a pressure signal from a sensor mounted below the oil cooler
via the DAU and sweeps a scale marked from 0 psi to 100 psi in 5 psi
increments.
Oil pressure is also continuously displayed in the engine data block
located in the lower right corner of the PFD.
In the event oil pressure falls below 10 psi or exceeds 99 psi, the MFD
will display “Check Oil Press” in a red advisory box in the lower right
corner of the MFD.
In the event oil pressure falls below 30 psi or exceeds 75 psi, the MFD
will display “Check Oil Press” in a yellow advisory box in the lower right
corner of the MFD.
28 VDC for the digital instrument operation is supplied through the 2-
amp ANNUN / ENGINE INST circuit breaker on the Essential Bus
Fuel Flow and/or Manifold Pressure Gage
Serials 1268 through 1581: A 2¼” combination Fuel Flow and Manifold
Pressure indicator is mounted on the right instrument panel
immediately below the tachometer. The indicator is internally lighted.
March 2010
Information Manual 7-53
Cirrus Design Section 7
SR20 Airplane Description
28 VDC for instrument operation is supplied through the 5-amp
ENGINE INST circuit breaker on Main Bus #1.
The Fuel Flow pointer sweeps a scale marked from 0 to 30 Gal/Hr.
The electrically operated Fuel Flow indicator receives a fuel-flow rate
signal from a fuel-flow transducer on the right side of the engine in the
fuel line between the engine driven fuel pump and throttle body
metering valve.
The Manifold Pressure pointer sweeps a scale marked from 10 to 30
inches Hg in one-inch Hg increments. The electrically operated
manifold pressure indicator receives a pressure signal from a pressure
sensor mounted in the induction airstream on the left side of the
induction air manifold near the throttle body.
Serials 1582 and subsequent: Manifold pressure is shown in the upper
left corner of the MFD as both a simulated temperature gage and as
text.
The simulated gage receives a pressure signal from a pressure sensor
mounted in the induction air manifold near the throttle body via the
DAU and sweeps a scale marked from 10 to 30 inches Hg in one-inch
Hg increments.
Manifold pressure is also continuously displayed in the engine data
block located in the lower right corner of the PFD.
28 VDC for the digital instrument operation is supplied through the 2-
amp ANNUN / ENGINE INST circuit breaker on the Essential Bus.
Percent Power Gage
Serials 1582 and subsequent: Percent power is shown in the upper
middle section of the MFD as both a simulated gage and as text.
The simulated gage displays calculated percent of maximum engine
power produced by the engine based on an algorithm employing
manifold pressure, indicated air speed, outside air temperature,
pressure altitude, engine speed and fuel flow. The percent power gage
sweeps a scale marked from 0 to 100 percent in 5 percent increments.
Percent power is also continuously displayed in the upper left area of
the PFD in vertical tape format and as text immediately above.
March 2010
7-54 Information Manual
Section 7 Cirrus Design
Airplane Description SR20
28 VDC for the digital instrument operation is supplied through the 2-
amp ANNUN / ENGINE INST circuit breaker on the Essential Bus.
Oil Warning Light
The red OIL warning light in the annunciator panel comes on to
indicate either high oil temperature or low oil pressure. The light is
illuminated by a switch in the oil temperature gage/DAU if the oil
temperature reaches 240°F or if the oil pressure drops to 10 psi or
less. If the OIL warning light comes on in flight, refer to the oil
temperature and pressure gages to determine the cause. Typically, low
oil pressure will be accompanied by a high oil temperature indication.
The light is powered by 28 VDC through the 2-amp ANNUN / ENGINE
INST circuit breaker on the Essential Bus.
March 2010
Information Manual 7-55
Cirrus Design Section 7
SR20 Airplane Description
Propeller
The airplane is equipped with a constant-speed, aluminum-alloy
propeller with a governor. The airplane is available with the standard
two-blade (76” diameter) propeller or an optional three-blade (74”
　
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