A318/A319/A320/A321 机组训练手册 FCTM Flight Crew Training Manual(163)

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? 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 PERFORMANCES
The use of FLEX thrust for takeoff on contaminated runways is prohibited.
If anti-ice is used at takeoff, the crew will apply the related performance penalty.
Slush, standing water, or deep snow reduces the aircraft takeoff performance because of increased rolling resistance and the reduction in tire-to-ground friction. A higher flap setting will increase the runway limited takeoff weight, but will reduce second segment limited takeoff weight.
TAKEOFF ROLL
Before the aircraft lines up on the runway for takeoff, the flight crew must ensure that the airframe has no ice or snow.
 

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A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

Then, before applying thrust, the Captain should ensure that the nosewheel is straight. If there is a tendency to deviate from the runway centerline, this tendency must be neutralized immediately, via rudder pedal steering, not via the tiller.
On contaminated runways, the flight crew should ensure that engine thrust advances symmetrically to help minimize potential problems with directional control.
MAXIMUM CROSS WIND
The following table provides the maximum crosswind that corresponds to the reported runway-friction coefficient:
Reported Braking Action Reported Runway-Friction
Coefficient Equivalent
Runway Condition Maximum
Crosswind (knots)
Good/Medium 0.39 to 0.36 1 29
Medium 0.35 to 0.3 2/3 25
Medium/Poor 0.29 to 0.26 2/3 20
Poor ≤0.25 3/4 15
Unreliable - 4/5 5

The equivalent runway condition numbers, in the above table, correspond to the following runway conditions:
1. Dry, damp, or wet runway (less than 3 mm waterdepth)
2. Runway covered with slush
3. Runway covered with dry snow
4. Runway covered with standing water with risk of aquaplaning or wet snow
5. Icy runway or high risk of aquaplaning
CLIMB/ DESCENT
Whenever icing conditions are encountered or expected, the engine anti-ice should be turned on. Although the TAT before entering clouds may not require engine anti-ice, flight crews should be aware that the TAT often decreases significantly, when entering clouds.
In climb or cruise, when the SAT decreases to lower than -40 °C, engine anti-ice should be turned off, unless flying near CBs.
　
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