SECTION 6 CESSNA
EMERGENCY PROCEDURES MODEL 162
GARMIN G300
U.S.
INADVERTENT FLIGHT INTO ICING CONDITIONS
Flight into icing conditions is prohibited and extremely dangerous.
While an inadvertent encounter with these conditions can be resolved
using the checklist procedures, the best action is to turn back or
change altitude immediately to escape icing conditions.
Watch for signs of pitot-static icing and ice accretion on the unheated
pitot tube. If airspeed and altimeter indications become unreliable, GPS
derived flight information can provide approximate values for back-up.
GPS derived ground speed (GS) and GPS ALTITUDE on the MFD
INFO page (if installed) may be used for comparison to barometric
instruments. GPS ALTITUDE information also replaces barometric
altitude in the TERRAIN Page PROFILE window (indicated by a white
arrowhead) when the ADAHRS is inoperative.
In the event of an icing encounter, an unexplained loss of engine power
could be caused by carburetor ice or ice blocking the air intake filter.
Should this happen, apply full carburetor heat and adjust throttle to
obtain maximum RPM. In some instances, the throttle may need to be
reduced for maximum power. The mixture should then be adjusted, as
required, to obtain maximum RPM. The G300 CARB °F indicator
should be monitored during carb heat application to ensure carb
temperature rises. Refer to the CARBUETOR ICING AMPLIFIED
EMERGENCY PROCEDURE section.
Maximum cabin heat should be applied, by pulling the CABIN HEAT
Control Knob to the full out position, in an attempt to clear ice from the
windshield. GPS moving map navigation may assist if ice creates a loss
of visibility. If available, select G300 TERRAIN - ON for additional
altitude and obstacle awareness during reduced visibility. Use of a
forward slip can improve forward and over-the-nose landing visibility
inhibited by windshield ice. FLAPS should NOT be used for landing if
airframe ice is present.
The autopilot, if installed, should be disconnected at first indication of
airframe icing and remain disconnected after any icing encounter due
to the possibility of unseen residual ice on the airframe.
162PHUS-00
6-34
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