Attitude Heading Reference System (AHRS, sensors replace traditional gyros)
Magnetometer (supplies heading information to AHRS, located in left wing)
Air Data Computer (ADC, compiles info from pitot/static system and OAT)
Engine Monitor (compiles engine info and sends it to avionics unit)
Transponder (ADS-B transponder that is operated on PFD)
XM data link (provides weather and radio data to MFD)
The PFD shows primary flight information in place of traditional pitot- static and gyroscopic
instruments, and also provides an HSI for navigation. A slip- skid indicator is located at the
top of the attitude indicator. Step on the “brick” instead of the “ball”. Use the reference lines
and the magenta line that appears above the heading indicator to identify a standard rate or
half-standard rate turn. Outside air temperature (OAT) displays on PFD under the airspeed
tape.
Ground track can be identified on the heading indicator by a small magenta diamond
near the lubber line (only visible when ground track is different than heading). The digital
altitude and airspeed readouts are very sensitive and can cause some pilots to continuously
make corrections for insignificant deviations.
The MFD displays a large scaleable, moving map that corresponds to the airplane’s current
location. Data from other components of G1000 can be overlaid onto the MFD. The MFD is
also the principle display of engine information. Revisionary mode places basic flight info on
both PFD and MFD which allows for safe operation if a screen fails.
Summary of Contents for C172S Nav III
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