SUPPLEMENTARY INFORMATION
PRELIMINARY PAGES
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL SUMMARY OF HIGHLIGHTS
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SUPPLEMENTARY INFORMATION
ADVERSE WEATHER
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL
GENERAL
Applicable to: ALL
The adverse weather operation take into account the following topics:
? Cold weather operations and icing conditions
? Turbulence
? Windshear
? Volcanic ashes
COLD WEATHER OPERATIONS AND ICING CONDITIONS
Applicable to: ALL
PREFACE
Aircraft performance is certified on the basis of a clean wing. Ice accretion affects wing
performance. When the wing is clean, the airflow smoothly follows the shape of the wing. When the wing is covered with ice, the airflow separates from the wing when the Angle-Of-Attack (AOA) increases. Therefore, the maximum lift-coefficient is reduced. As a result, the aircraft may stall at a lower AOA, and the drag may increase.
The flight crew must keep in mind that the wing temperature of the aircraft may be significantly lower
than 0 °C, after a flight at high altitude and low temperature, even if the Outside Air Temperature (OAT) is higher than 0 °C. In such cases, humidity or rain will cause ice accretion on the upper wing, and light frost under the wing. (Only 3 mm of frost on the under side of the wing tank area is acceptable.)
EXTERIOR INSPECTION
When icing conditions on ground are encountered, and/or when ice accretion is suspected, the Captain should determine, on the basis of the exterior inspection, whether the aircraft requires ground deicing/anti-icing treatment. This visual inspection must take into account all vital parts of the aircraft, and must be performed from locations that offer a clear view of these parts.
COCKPIT PREPARATION
The following systems may be affected in very cold weather:
? The EFIS/ECAM (when the cockpit temperature is very low)
? The IRS alignment (may take longer than usual, up to 15 min)
The probe and window heating may be used on ground. Heating automatically operates at low power.
SUPPLEMENTARY INFORMATION
ADVERSE WEATHER
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL
AIRCRAFT GROUND DE-ICING/ANTI-ICING
DE-ICING/ANTI-ICING FLUID
Deicing/anti-icing fluids must be able to remove ice and to prevent its accumulation on aircraft surfaces until the beginning of the takeoff. In addition, the fluids must flow off the surfaces of the aircraft during takeoff, in order not to degrade takeoff performance.
Several types of fluids can be used. These fluids have different characteristics:
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