PILOT’S OPERATING HANDBOOK
SECTION 4
NORMAL PROCEDURES
EASA Approved
Edition 0 -- October 31, 2013
Rev. 1
Page 4.5.4
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 that splash or splatter on impact at temperatures below 0
°
C
ambient air temperature.
Procedures for exiting the severe icing environment
REMARK
:
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.
4 - If the autopilot is engaged, hold the control wheel firmly and disengage the autopilot.
5 - If an unusual roll response or uncommanded roll control movement is observed, reduce the angle-of-attack.
6 - Do not extend flaps when holding in icing conditions. Operation with flaps extended can result in a reduced
wing angle-of-attack, with the possibility of ice forming on the upper surface further aft on the wing than
normal, possibly aft of the protected area.
7 - If the flaps are extended, do not retract them until the airframe is clear of ice.
8 - Report these weather conditions to Air Traffic Control.
