Windshear

Question 1

What are the unacceptable flight path deviations? (5 +3)

Answer 1

\+/- 15kts
\+/- 500fpm
\+/- 5˚pitch
\+/- 1 dot ILS G/S
Unusual power settings

• Heading variations of > 10˚
• Ground Speed variations
• Wind indication variations on the ND

Question 2

What system provides the Predictive Windshear?
When is it active?
How is it prioritised?

Answer 2

• The Weather Radar provides the PWS.
• Active when <1500ft. Inhibited on t/o 100kts - 50R, on landing <50R.
• Prioritised over TCAS and GPWS but overridden by FAC W/S and Stall warnings.

Question 3

What provides the W/S Detection and Warnings?
When is it active?
What is the warning?

Answer 3

• W/S detection and warnings are provided by the FACs.
• Active 3s after t/o and <1300R to 50R with at least CONF 1 selected.
• WINDSHEAR on both PFD’s for 15s and aural WINDSHEAR x3

Question 4

What are the “Tools for Escape”?

Answer 4

• ALPHA FLOOR; TOGA automatically selected > TOGA LK as AoA decreases > disconnect A/THR top disconnect TOGA LK
• SRS; minimises height loss
• High AoA protection; allows selection of full back stick for max lift and minimises drag by retracting flaps.

Question 5

Following TOGA selection what pitch should be flown?

Answer 5

• If FDs available; SRS commands

- If no FDs; 17.5˚

Question 6

When can predictive W/S warnings be ignored?

Answer 6

• no other signs of possible windshear AND reactive W/S system operational.

Question 7

Prior to take-off what precautions should you take? (5)

Answer 7

• Delay takeoff
• Evaluate conditions
• Use most favourable runway
• Asses with Wx radar
• Use TOGA

Question 8

What are the Predictive W/S alerts?

Answer 8

• MONITOR RADAR DISPLAY and WINDSHEAR AHEAD

Question 9

Prior to V1 what are the correct actions for;

• “Windshear Ahead”
• “Monitor Radar Display”?

Answer 9

• STOP

- STOP or CONTINUE

Question 10

After V1 what are the correct actions for;

• “Windshear Ahead”
• “Monitor Radar Display”?

Answer 10

• Set TOGA

- Set TOGA, normal rotation

Question 11

Are configuration changes allowed?

Answer 11

Yes, providing you don’t enter windshear.

Question 12

If there is suspected windshear or a predictive windshear during approach what should you do?

If you then chose to continue what should you consider?

Answer 12

• Delay or divert.
• Assess from experience, most favourable runway, use Flap 3 for better climb gradient, use managed speed (G/S mini), add 1/3 mean HWC up to 15kts.

Question 13

On approach, correct actions for;

• Monitor Radar Display.
• Go Around, Windshear Ahead
• Windshear?

Answer 13

• Manoeuvre to avoid
• Go-around (normal), TOGA must be selected
• Windshear G/A

Question 14

Following a windshear escape manoeuvre, how do you rebuild?

Answer 14

FD’s off > 15˚ nose up & TOGA > check not in CONF 1+F > “Go-around, Flaps” > unlock Alpha Floor > 10˚ nose up CLB > FD’s on