. Delay the approach and landing until conditions improve or divert to a suitable airport;
When downburst / wind shear conditions are anticipated based on pilot’s reports from preceding aircraft or based on an alert issued by the airport low level wind shear alert system (LLWAS), the landing should be delayed or the aircraft should divert to the destination alternate airport.
. Select the most favorable runway, considering:
. the location of the likely wind shear / downburst condition; and,
. the available runway approach aids.
.
Use the weather radar (or the predictive wind shear system, as available) during the approach to ensure that the flight path is clear of potential hazard areas;
.
Select the flight path vector display on the PNF ND to obtain a direct visual cue of the flight path angle (during the approach or during the recovery/escape maneuver).
.
Select less than full flaps for landing (to maximize the climb-gradient capability) and adjust the final approach speed accordingly;
.
If an ILS is available, engage the autopilot for a more accurate approach tracking and for taking benefit of the glide slope excessive-deviation-warning;
.
Select a final approach speed based on the reported surface wind;
A speed increment is recommended (usually up to 15 kt to 20 kt, based on the anticipated wind shear value);
.
Compare the head wind component or tail wind component aloft and the surface head wind or tail wind component to assess the potential and likely degree of vertical wind shear;
.
Closely monitor the airspeed, speed trend and ground speed during the approach to detect any evidence of impending wind shear;
Microbursts are characterized by a significant increase of the headwind component preceding a sudden change to a tailwind component, whenever wind shear is anticipated closely monitor the ground speed enhanced wind shear awareness;
If ground speed decreases (i.e., increasing head wind), maintain a ground speed not lower than V APP – 10 kt to maintain the aircraft energy level in case of sudden head wind to tail wind change.
Wind Shear Awareness
Page 6
AIRBUS INDUSTRIE
Flight Operations Support
. Be alert to respond without delay to :
. Any predictive windshear advisory, W/S AHEAD caution or W/S AHEAD warning; and/or,
. A reactive WINDSHEAR warning.
For respective W/S AHEAD and WINDSHEAR procedures, refer to the applicable FCOM and QRH.
Recovery technique for wind shear encounter during approach and landing
If wind shear is encountered during the approach or landing, the following recovery techniques should be implemented without delay:
.
Trigger the go-around levers (or set thrust levers to TOGA, as applicable) and maintain the maximum go-around thrust;
.
Follow the FD pitch orders or set the pitch attitude target recommended in the FCOM (if FD is not available);
.
If the AP is engaged keep the AP engaged.
As required, disconnect the AP and follow the FD orders, or set and maintain the recommended pitch attitude;
.
Do not change the flaps and landing gear configuration until out of the wind shear condition;
.
Level the wings to maximize climb gradient, unless a turn is required for obstacle clearance;
.
Allow airspeed to decrease to stick shaker activation boundary (intermittent stick shaker activation – conventional aircraft only) while monitoring speed trend;
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本文鏈接地址：Getting to Grips with Approach-and-Landing Accidents Reducti(111)
