GPWS and Windshear Reactions

Question 1

Windshear Precautions
Takeoff
Landing

Answer 1

Takeoff
1. TOGA Thrust
2. Longest suitable runways
3. Consider Flaps 2
4. V-Speeds: Takeoff using max thrust with reduce thrust v-speeds
5. Increase rotation speed - use VR MAX
6. Use 1500 AFE for THR RED/ACC

Landing
1. Use Flaps 3
2. Consider higher VAPP (up to VLS+15)
3. Use 1500 AFE for THR RED/ACC
4. Stabilized Approach by 1000 AGL
5. Use Managed Speed to provide GSmini
6. Use AP, ATHR, and FDs
7. Avoid large manual thrust reductions in response to sudden airspeed increases
8. Closely monitor vertical flight path
9. Touchdown within normal TDZ, don’t allow aircraft to float

Question 2

“TOO LOW, GEAR”
“TOO LOW, FLAPS”
Red GPWS Light

Answer 2

Missed Approach

Question 3

GPWS CAUTION
“SINK RATE”
“GLIDE SLOPE”
“SPEED, SPEED, SPEED”
Amber G/S or Red GPWS light

Answer 3

Above 500AGL:
Immediately adjust thrust and pitch

Below 500ft:
Missed approach

If VMC:
Captain discretion

Question 4

EGPWS CAUTION

“CAUTION, TERRAIN”
“TERRAIN AHEAD”
“CAUTION, OBSTACLE”
“SPEED, SPEED, SPEED”

Answer 4

Adjust flight path and advise ATC

*accompanied by solid yellow terrain display and “TERR” or “TERR AHEAD” on ND, Red GPWS light

Question 5

GPWS/EGPWS TERRAIN WARNING

“TERRAIN, TERRAIN, PULL UP …”
“TERRAIN AHEAD, PULL UP …”
“TERRAIN, TERRAIN”
“TOO LOW, TERRAIN”
“OBSTACLE, OBSTACLE, PULL UP …”
“OBSTACLE AHEAD, PULL UP …”

Answer 5

Night IMC or Day VMC if terrain or obstacle hazard exists:
“TOGA THRUST, STOW SPEED BRAKES”
1. Disengage AP
2. Select TOGA thrust
3. Wings level & pitch to ALPHA MAX
4. Retract SPEED BRAKES
5. Verify Actions Completed
6. Maintain Config and Monitor
7. When clear - decrease pitch and accelerate

Day VMC and no terrain/obstacle hazard:
- immediately take corrective action and advise ATC

Question 6

PWS Advisory
No Audio
PWS symbol on ND

What you do:
Prior to Takeoff
Before V1
After V1
Approach

Answer 6

Prior to Takeoff:
- Apply W/S Precautions

Before V1:
- Continue Takeoff
- Go TOGA thrust

After V1:
- Continue normal climbout

Approach:
- Apply W/S precautions

Question 7

FAC REACTIVE WINDSHEAR
Aural: “WINDSHEAR, WINDSHEAR, WINDSHEAR”
PFD: Red “WINDSHEAR”

What you do:
Before V1
After V1
Approach

Answer 7

Before V1:
- RTO

After V1:
“TOGA THRUST, STOW SPEED BRAKES”
1. Select TOGA
2. Disconnect AP
3. Pitch SRS or 17.5° & wings level
4. Retract Speed Brakes

Approach:
“TOGA THRUST, STOW SPEED BRAKES”
1. Select TOGA
2. Disconnect AP
3. Pitch SRS or 17.5° & wings level
4. Retract Speed Brakes

Question 8

When are PWS Alerts Inhibited?

Answer 8

New alerts inhibited:
1. During takeoff from 100kts to 50ft
2. During approach from 50ft to 60kts

Question 9

PWS Caution
Aural: “MONITOR RADAR DISPLAY”
PFD: Amber “W/S AHEAD”
ND: PWS Symbol

What you do:
Prior to Takeoff
Before V1
After V1
Approach

Answer 9

Prior to Takeoff:
Delay T/O

Before V1:
RTO

After V1:
TOGA, Normal T/O Profile
* coordinate turns with ATC

Approach:
- If unstable, normal GA
* coordinate turns with ATC

Question 10

PWS Warning
Aural: “WINDSHEAR AHEAD”
“GO-AROUND, WINDSHEAR AHEAD”
PFD: Red “W/S AHEAD”
ND: PWS Symbol

What you do:
Prior to Takeoff
Before V1
After V1
Approach

Answer 10

Prior to Takeoff:
Delay T/O

Before V1:
RTO

After V1:
TOGA, Normal T/O Profile
* no turns

Approach:
- GA, no turns