AIRPLANE
OPERATIONS
MANUAL
SUPPLEMENTARY
P
ROCEDURES
ENVIRONMENTAL
REVISION 41
1-02-79
Page
19
Code
01
Copyright © by Embraer. Refer to cover page for details.
GENERAL REMARKS WHEN FLYING IN ICING CONDITIONS
− Continuously monitor engine parameters, airplane pitch attitude
and airspeed.
− Be careful for any mistrimmed condition that may be masked by
the autopilot - keep the airplane trimmed at all times. Consider
turning the autopilot off if you suspect you are flying in severe icing
conditions.
− Monitor anti-ice systems for proper operation. Apply the
associated AFM abnormal procedure in case of system failure. If
the failure persists, exit and avoid icing conditions. Make the air
traffic controller know you are requesting a change due to icing
conditions and keep him informed about it.
− Strictly follow AFM Operation In Icing Condition normal
procedures.
− Avoid landing in an airport where icing conditions exist or are
anticipated if anti-ice system, brakes, thrust reverse, ground
spoilers, nosewheel steering or flight controls have failed.
− Do not hesitate to leave icing conditions when icing cannot be
handled, even with anti-ice system operating properly.
NOTE: Engine and Wing Ice Protection Systems operation is
automatic and based on the primary ice detection system.
However, the crew remains responsible for monitoring icing
conditions and for manual activation of the ice protection
system if icing conditions are present and the ice detection
system is not activating the ice protection system.
FREEZING RAIN AND FREEZING DRIZZLE
Atmospheric conditions involving freezing rain or freezing drizzle
associated to supercooled large droplets (SLD), may present a
condition that is beyond those for which the airplane was certified.
Both freezing rain and freezing drizzle can exist down to ground level
and cause ice to form quite rapidly on all surfaces even during short
exposures and on areas not normally known to be subjected to ice
accretion. This means that the airplane is not designed to fly under
freezing rain/drizzle (SLD) conditions.
If the crew notices abnormal ice formation on areas not usually
affected by this phenomenon, or ice formation on the previously
treated upper surface of the wings, they must consider to be flying
under severe icing conditions. In this case, the anti-ice system is
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