SECTION 7
CESSNA
AIRPLANE AND SYSTEM DESCRIPTION
MODEL 172S NAV III
GFC 700 AFCS
U.S.
STANDARD AVIONICS
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AIR DATA COMPUTER (GDC)
The Air Data Computer (ADC) compiles information from the airplane's
pitot-static system. The ADC unit is mounted behind the instrument
panel, just forward of the MFD. An outside air temperature probe,
mounted on top of the cabin, is connected to the ADC. The ADC
calculates pressure altitude, airspeed, true airspeed, vertical speed and
outside air temperature.
ENGINE MONITOR (GEA)
The Engine Monitor is responsible for receiving and processing the
signals from all of the engine and airframe sensors. It is connected to
all of the CHT measuring sensors, EGT sensors, RPM, fuel flow and to
the fuel gauging system. This unit transmits this information to the
engine display computers.
TRANSPONDER (GTX)
The full-featured Mode S transponder provides Mode A, C and S
functions. Control and operation of the transponder is accomplished
using the PFD. The transponder unit is mounted in the tailcone avionics
racks.
XM WEATHER AND RADIO DATA LINK (GDL)
The XM weather and radio data link provides weather information and
digital audio entertainment in the cockpit. The unit is mounted in the
tailcone, behind the baggage curtain. This unit communicates with the
MFD on the high-speed data bus. XM weather and XM radio operate in
the S-band frequency range to provide continuous uplink capabilities at
any altitude throughout North America. A subscription to the XM
satellite radio service is required for the XM weather and radio data link
to be used.
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172SPHBUS-00
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Summary of Contents for Cessna C172S PIM
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