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? The aircraft can be deiced/anti-iced, with the engine and/or the APU running or off. However, the APU or the engine should not be started during spraying.
? The aircraft must be deiced/anti-iced symmetrically on both sides.
? After spraying, keep bleeds off for a few minutes, and perform a visual inspection of the aircraft surfaces.
? A deicing/anti-icing report must be filled out to indicate the type of fluid and when the spraying began.
 
SUPPLEMENTARY INFORMATION
ADVERSE WEATHER
 
AFTER START
? Keep the engine bleeds off, with the engines running at higher N1.
? Keep the APU running with the bleed off for a few minutes after spraying.
? The slats/flaps and flight controls can be moved, because they no longer have ice.
TAXI-OUT
On contaminated runways, the taxi speed should be limited to 10 kt, and any action that could distract the flight crew during taxiing should be delayed until the aircraft is stopped.
The following factors should be taken into account:
? At speeds below 10 kt: Anti-skid deactivates.
? Engine anti-ice will increase ground idle thrust.
? To minimize the risk of skidding during turns: Avoid large tiller inputs.
? On slippery taxiways: It may be more effective to use differential braking and/or thrust, instead of nosewheel steering.
? On slush-covered, or snow-covered, taxiways: Flap selection should be delayed until reaching the holding point, in order to avoid contaminating the flap/slat actuation mechanism.
? When reaching the holding point: The "Before Takeoff down to the line" checklist must be performed.
? The flight crew must maintain the aircraft at an appropriate distance from the aircraft in front.
? In icing conditions: When holding on ground for extended periods of time, or if engine vibration occurs, thrust should be increased periodically, and immediately before takeoff, to shed any ice from the fan blades.
For more details about this procedure, Refer to FCOM/PRO-NOR-SOP-09-A AFTER START - ENG ANTI-ICE.
TAKEOFF
TAKEOFF PERFORMANCE
When taking off from contaminated runways, it is not permitted to use FLEX thrust. However, derated thrust �� may be used, as required, in order to optimize aircraft performance. When available, a derated takeoff �� thrust results in lower minimum control speeds and, therefore,
in a lower V1. A reduction in the minimum control speeds can sometimes enhance takeoff performance.
If anti-ice is used, the flight crew must apply the applicable performance penalty.
Slush, standing water, and/or deep snow reduce the effectiveness of aircraft takeoff performance,
because of increased rolling resistance and reduction in tire-to-ground friction. A higher flap setting increases the runway-limited takeoff weight, but reduces the second segment limited takeoff weight.
　
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