SUPPLEMENTARY INFORMATION
ADVERSE WEATHER
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL
Wing anti-ice should be turned on, if either severe ice accretion is expected, or if there is any indication of icing on the airframe.
HOLDING
If holding is performed in icing conditions, the flight crew should maintain clean configuration. This is because prolonged flight in icing conditions with the slats extended should be avoided.
APPROACH
If significant ice accretion develops on parts of the wing that have not been deiced, the aircraft speed must be increased (Refer to FCOM/PRO-SUP-30 OPERATIONS IN ICING CONDITIONS).
When the temperature is lower than ISA -10, the target altitudes (provided by the ATC) must be corrected, by adding the values that are indicated in the table below:
Corrections to be Added
Height ISA -10 ISA -20 ISA -30
500 50 70 100
1 000 100 140 190
2 000 200 280 380
3 000 290 420 570
4 000 390 570 760
5 000 490 710 950
These corrections corresponds approximately to 4 x Delta ISA x Height (ft)/1000 LANDING
Obviously, landings should be avoided on very slippery runways. However, if it is not possible to avoid such landings, the following factors (linked to operations on contaminated runways) should be considered:
? Braking action
? Directional control
BRAKING ACTION
The presence of fluid contaminants on the runway has an adverse effect on braking performance, because it reduces the friction between the tires and the surface of the runway. It also creates a layer of fluid between the tires and the runway surface, and reduces the contact area. The landing distances, indicated in the QRH, provide a good assessment of the real landing distances for specific levels of contamination.
A firm touchdown should be made and MAX reverse should be selected, as soon as the main landing gear is on ground. Using reversers on a runway that is contaminated with dry snow may reduce visibility, particularly at low speeds. In such cases, reverse thrust should be reduced to idle, if necessary.
SUPPLEMENTARY INFORMATION
ADVERSE WEATHER
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL
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