Engine Instruments - Cessna 172S NAV III Pilot Operating Handbook

CESSNA
MODEL 172S NAV III
ENGINE
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ENGINE INSTRUMENTS
SECTION 7
AIRPLANE AND SYSTEMS DESCRIPTION
The G1000 Engine Indicating System (EIS) provides graphical
indicators and numeric values for engine, fuel, and electrical system
parameters to the pilot. The EIS is shown in a vertical strip on the
left side of the PFD during engine starts and on the MFD during
normal operation. If either the MFD or PFD fails during flight, the
EIS is shown on the remaining display.
The EIS consists of three pages that are selected using the ENGINE
softkey. The ENGINE page provides indicators for Tachometer,
Fuel Flow, Oil Pressure, Oil Temperature, Exhaust Gas
Temperature (EGT), Vacuum, Fuel Quantity, Engine Hours,
Electrical Bus Voltages, and Battery Currents. When the ENGINE
softkey is pressed, the LEAN and SYSTEM softkeys appear
adjacent to the ENGINE softkey. The LEAN page provides
simultaneous indicators for CHT and EGT on all cylinders to be
used for adjusting ("leaning") the fuel/air mixture. The SYSTEM
page provides numerical values for parameters on the ENGINE
page that are shown as indicators only. The SYSTEM page also
provides a digital value for fuel flow (FFLOW GPH) and fuel used
(GAL USED).
The GEA-71 Engine and Airframe Unit, located forward of the
instrument panel, receives signals from the engine/system sensors
for the parameters that are being monitored. The GEA-71 provides
data to the EIS, which displays the data for the ENGINE page
described below.
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172SPHAUS-OO
U.S. 7-29