Pilot's Operating Handbook
Section 4
Normal procedures
EASA Approved
Edition 1 - January 15, 2018
Rev. 0
Page 4.5.6
Flight into severe icing conditions
The following weather conditions may be conducive to severe in-flight icing :
- Visible rain at temperatures below 0°C ambient air temperature,
- Droplets thatsplashorsplatter onimpact at temperaturesbelow 0°C ambient
air temperature.
Procedures for exiting the severe icing environment
● NOTE ●
These procedures are applicable to all flight phases from takeoff to landing.
●
Monitor the ambient air temperature. While severe icing may form at temperatures as
cold as - 18°C, increased vigilance is warranted at temperatures around freezing with
visible moisture present. If the visual cues specified in section 2 Limitations for
identifying severe icing conditions are observed, accomplish the following :
1 - Immediately request priority handling from Air Traffic Control to facilitate a
route or an altitude change to exit the severe icing conditions in order to avoid
extended exposure to flight conditions more severe than those for which the
airplane has been certificated.
2 - Avoid abrupt and excessive maneuvering that may exacerbate control
difficulties.
3 - Do not engage the autopilot.
If the autopilot is engaged :
4 - Hold the control wheel firmly and disengage the autopilot.
If an unusual roll response or uncommanded roll control movement is observed :
5 - Angle-of-attack Reduce. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 - Do not extend flaps when holding in icing conditions. Operation with flaps
extendedcan resultina reduced wing angle-of-attack, with thepossibilityof ice
formingon the upper surface further aft on the wing than normal, possibly aft of
the protected area.
If the flaps are extended :
7 - Do not retract them until the airframe is clear of ice.
8 - Report these weather conditions to Air Traffic Control.
End of procedure.
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