EGPWS

Question 1

What is the main difference between a GPWS caution and a GPWS WARNING?

Time to impact.

Answer 1

A GPWS CAUTION requires flight crew to correct the flight path, airplane configuration, or airspeed to prevent a GPWS caution from escalating into a GPWS WARNING. GPWS cautions indicate 40 to 60 seconds from projected impact, where GPWS warning indicate 20 to 30 seconds from projected impact.

Question 2

Recall actions required in the event of a EGPWS WARNING…

Answer 2

1. Disengage autopilot.
2. Disengage autothrottle.
3. Apply maximum thrust (Aggressively).
4. Simultaneously:
   Roll wings level and rotate to an initial pitch
   attitude of 20°.
5. Retract speed-brakes.
6. If terrain remains a threat,
   continue rotation up to the pitch
   limit indicator.

• Do not change gear or flap
  configuration until terrain
  separation is assured.
• Monitor radio altimeter for
  sustained or increasing terrain
  separation.
• When clear of terrain, slowly
  decrease pitch attitude and
  accelerate.