Textron Cessna C172S PIM, Pilot Operating Handbook

Page: 294 / 322

SECTION 7 CESSNA
AIRPLANE AND SYSTEM DESCRIPTION MODEL 172S NAV III
GFC 700 AFCS
U.S.
CABIN FEATURES
(Continued)
CARBON MONOXIDE DETECTION SYSTEM
The carbon monoxide (CO) detection system consist of a single
detector located behind the instrument panel, powered by the
airplane’s DC electrical system and integrated in the Garmin G1000
system with a warning annunciation and alert messages displayed on
the PFD.
When the CO detection system senses a CO level of 50 parts-per-
million (PPM) by volume or greater the alarm turns on a flashing
warning annunciation, CO LVL HIGH, in the annunciation window on
the PFD with a continuous tone until the PFD softkey below WARNING
is pushed. It then remains on steady until the CO level drops below 50
PPM and automatically resets the alarm.
If the CO system detects a problem within the system that requires
service, a CO DET SRVC message is displayed in the alerts window of
the PFD. If there is an interface problem between the G1000 system
and the CO system a CO DET FAIL message is displayed in the alerts
window of the PFD.
172SPHBUS-00
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