TM 55-1510-222-10accumulation on the aircraft will result in higher stallingairspeeds due to the change in aerodynamic characteristicsand increased weight of the aircraft due to ice buildup.Approach and landing airspeeds must be increasedaccordingly.NOTEWhen operating on wet or icy runways, refer tostopping distance factors shown in Chapter 7.8-55A. ICING (SEVERE).a. The following weather conditions may be conduciveto severe in-flight icing:(1) Visible rain at temperatures below zero degreesCelsius ambient air temperature.(2) Droplets that splash or splatter on impact attemperatures below zero degrees Celsius ambient airtemperature.b. The following procedures for exiting a severe icingenvironment are applicable to all flight phases from takeoffto landing.(1) Monitor the ambient air temperature. Whilesevere icing may form at temperatures as cold as -18degrees Celsius, increased vigilance is warranted attemperatures around freezing with visible moisture present.(2) Upon observing the visual cues specified in thelimitations section of the airplane flight manual (MilitaryOperations Manual) for the identification of severe icingconditions (reference paragraph 5-32B.), accomplish thefollowing:(a) Immediately request priority handling fromair traffic control to facilitate a route or an altitude changeto exit the severe icing conditions in order to avoidextended exposure to flight conditions more severe thanthose for which the airplane has been certificated.(b) Avoid abrupt and excessive maneuveringthat may exacerbate control difficulties.(c) Do not engage the autopilot.(d) If the autopilot is engaged, hold the controlwheel firmly and disengage the autopilot.(e) If an unusual roll response oruncommanded roll control movement is observed, reducethe angle-of-attack.(f) Do not extend flaps during extendedoperation in icing conditions. Operations with flapsextended can result in a reduced angle-of-attack, with thepossibility of ice forming on the upper surface further afton the wing than normal, possibly aft of the protected area.(g) If the flaps are extended, do not retractthem until the airframe is clear of ice.(h) Report these weather conditions to airtraffic control.8-26 Change 3
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