Inadvertent Icing Encounter - Cub Crafters CC11-100 Pilot Operating Handbook

CUB CRAFTERS SECTION 3
CC11-100 EMERGENCY PROCEDURES

3.4.13 INADVERTENT ICING ENCOUNTER

Icing conditions are very difficult to predict. Aviation
weather services may predict light, moderate, or severe
icing conditions at certain locations and altitudes and no
icing will be encountered. At other times, icing conditions
may not be forecast and any of the above levels of icing
may occur.
When unexpected icing conditions are encountered,
immediate action must be taken to divert from them. It
may be possible to descend to a lower, warmer altitude,
or it may be necessary to return to an area where no
icing is present.
NOTE
Ice is especially prevalent if flying in clouds or visible
moisture. This aircraft is approved for VFR flight only.
If ice build-up becomes evident on the windshield and/or
the lift struts or if the engine operates rough, apply full
carburetor heat.
Carburetor ice may form in temperatures from 32° to
100°F when the relative humidity is greater than 50%. Be
alert for this condition if flying when the difference
between the temperature and dew point is less than 20°
or when there is visible moisture in the air. If carb icing is
suspected of causing a loss in power, apply full
carburetor heat. If the engine operation remains rough,
adjust the mixture control to obtain maximum
smoothness. Leave the throttle setting the same and
wait for the engine to run smoothly once again after the
ice is cleared. If there is no improvement, gradually apply
full throttle and initiate a maximum rate climb to produce
as much heat as possible under the cowling.
REPORT SC10000AFM
Issued: 08/01/06
Date of Revision: 11/23/18 Page number: 3-25