Windshear Flashcards
Windshear OM A 8.25.5.e/11.4.2
If SEVERE WS encountered on take-off or approach what must be done?
1- after V1 PF execute WS escape manoeuvre (before V1 RTO)
2- PM report WS to ATC stating
* height
* severity
Example:
SPEEDBIRD XX REPORTING SEVERE WINDSHEAR AT YYYY FEET. AIRSPEED LOSS 15 KNOTTS, VERTICAL SPEED LOSS IN EXCESS OF 1000FEET PER MINUTE.
Windshear OM A 8.25.5.e
If SEVERE WS is forecast or reported….
…. DO NOT TAKE OFF!!!
Windshear OM A 8.25.5.e
If WS is forecast or reported however nature or severity can not be determined….
…. you must use FULL THRUST for take-off.
Note: use CARD correction code for FT
Windshear OM A 8.25.5.e/11.4.2
SEVERE WS is considered to be UNCONTROLLABLE CHANGES from normal steady flight conditions BELOW 1000 FEET AGL, in excess of the following:
…
…
- 15 KTS IAS
- 500 FPM VS
- 5DEG PITCH ATT
- 1 DOT ILS GP DISPLACEMENT
- UNUSUAL THRUST LEVELS FOR SIGNIFICANT TIME
Windshear OM A 8.25.5.e
Can reduced thrust be used for take-off if WS is expected during deperture?
Reduced thrust can be used for TO if expected windshear is caused by strong winds not related to CBs or frontal activity.
Windshear OM A 8.25.5.e
Can you ever ignore a EGPWS WS warning!?
Never ignore EGPWS WS warning!
EXCEPTIONALLY, in conditions of strong winds extreme turbulence not related to CBs or frontal activity, a warning may be treated as advisory IF it was
- ANTICIPATED
- BRIEFED
- APPROPRIATE ALLOWANCES/COMPENSATION MADE.
Remember it this way- ABC
Anticipate
Brief
Compensate
Windshear OM A 8.25.5.e
What should you do after two WS go arounds at an aerodrome?
Consider a diversion!
Windshear FCOM SP.16.
If presence of WS is confirmed…
… *DELAY TO; or
*DO NOT START APP
Windshear FCOM SP.16.
Take-off considerations and precautions if WS is suspected are…
When WS reported or anticipated use FT for TO!!
- use F20 (F15 if obstacle clearance or climb gradient limited)
- use longest suitable RWY.
- use FD after TO
- be alert to IAS flactuations
- rotate at normal rate to initial CLMB pitch ATT and minimise reductions until clearance of obstacles and terrain is assured.
- monitor closely vertical path instruments (PM especially) such as VSI and Altimeter. Call out deviations from norm.
- trade speed for altitude but DO NOT EXCEED PLIs
Windshear FCOM SP.16.
APP and Landing considerations and precautions if WS reported or anticipated are:
- use F25 or F30 for LAND
- establish stabilised approach early no lower than 1000ft AGL
- avoid WS by using most suitable RWY (observe limits)
- add appropriate IAS corrections up to max 15kts
- avoid large thrust reductions to sudden IAS increases (these could be followed be large IAS decreases)
- crosscheck FD commands with other instruments
- use AP and AT for approach to improve monitoring. Closely monitor instruments such as RAD ALT indications VSI and Altimeter.
Windshear QRH Maneuvers
WS Escape Maneuver for Manual flight
MANUAL FLIGHT
PF 1. Call “WINDSHEAR GO-AROUND” 2. Disengage AP 3. Push TO/GA switch 4. AGGRESSIVELY apply MAX THRUST 5. Disconnect ATs 6. SIMULTANEOUSLY ROLL wings level and ROTATE towards initial PITCH ATT 15DEG 7. RETRACT SB 8. FOLLOW FD (if available) —- 9. Do NOT change AC configuration until WS is a no factor 10. MONITOR VS and ALTITUDE 11. Do NOT try to regain loss IAS until WS is a no factor
PM
1. VERIFY MAX THRUST
2. VERIFY ALL PF ACTIONS COMPLETE
——
3. MONITOR VS and ALTITUDE
4. CALL OUT *trend towards terrain
*descending flt path
*significant IAS changes
Windshear QRH Maneuvers
WS Escape Maneuver for Automatic flight
AUTOMATIC FLIGHT
PF
1. Call “WINDSHEAR GO-AROUND”
2. Push TO/GA switch
3. VERIFY TO/GA FMA (THR - TO/GA - TO/GA - AP)
4. VERIFY GA THRUST
5. RETRACT SB
6. MONITOR SYS Performance
—-
7. Do NOT change AC configuration until WS is a no factor
8. MONITOR VS and ALTITUDE
9. Do NOT try to regain loss IAS until WS is a no factor
PM
1. VERIFY GA THRUST
2. VERIFY ALL PF ACTIONS COMPLETE
——
3. MONITOR VS and ALTITUDE
4. CALL OUT *trend towards terrain
*descending flt path
*significant IAS changes
