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MK V & MK VII EGPWS Pilot Guide 51
Caution
Alerts
Warning
Alerts
Glideslope
Alerts
Recommended response to EGPWS alerts are as follows:
1. Stop any descent and climb as necessary to
eliminate the alert. Analyze all available instruments and
information to determine best course of action.
2. Advise ATC of situation as necessary.
1. Aggressively position throttles for maximum rated thrust.
Apply maximum available power as determined by
emergency need. The pilot not flying (if applicable) should
set power and ensure that TO/GA power and modes are set.
2. If engaged, disengage the autopilot and smoothly but
aggressively increase pitch toward “stick shaker” or Pitch
Limit Indicators (PLI) to obtain maximum climb
performance.
3. Continue climbing until the warning is eliminated and safe
flight is assured.
4. Advise ATC of situation.
NOTE: Climbing is the only recommended response unless
operating in visual conditions and/or pilot determines, based
on all available information, that turning in addition to the
climbing is the safest course of action. Follow established
operating procedures.
NOTE: Navigation must not be based on the use of the Terrain
Awareness and Alerting Display (TAD).
Below Glideslope alerts consist of “soft” and “hard” alerts
based on the degree of glideslope deviation and altitude.
Respond to these alerts as necessary to correct the aircraft’s
flightpath back to the Glideslope centerline or perform a
missed approach.
060-4241-000 • Rev. E - December 2003
52 MK V & MK VII EGPWS Pilot Guide
Advisory
Callouts
Windshear
Caution
Windshear
Warning
Advisory callouts being advisory in nature are used to
announce an event or condition (e.g., “Minimums”,
"RunwayXX" - if RAAS enabled).
Response to these callouts should be in accordance with
standard operating procedures.
This alert generally occurs due to increasing performance
windshear conditions (i.e., increasing headwind, decreasing
tailwind, and/or updraft). This alert is generally considered
advisory in that the crew response is to be alert to the
possibility of subsequent significant airspeed loss and down
draft conditions. Coupled with other weather factors, the
Windshear Caution should be considered in determining the
advisability of performing a go-around.
Wind and gust allowances should be added to the approach
speed, increasing thrust if necessary. It may be necessary to
disengage autopilot or auto-throttle. Avoid getting low on the
approach glidepath or reducing the throttles to idle.
When a Windshear warning occurs, the following procedures
should be followed:
1. Immediately initiate the Windshear escape maneuver in
accordance with established Windshear procedures.
2. Aggressively apply maximum rated thrust, disengage
autopilot and/or auto-throttle if necessary.
3. Rotate smoothly to the go-around/take-off pitch attitude,
allowing airspeed to decrease if necessary. Maintain wings
level. Do not retract flaps or landing gear.
4. If the aircraft continues to descend, increase pitch attitude
smoothly and in small increments, bleeding air speed as
necessary to stop descent. Use Stall Warning onset (stick
shaker) as the upper limit of pitch attitude.
5. Maintain escape attitude and thrust and delay retracting
flaps or landing gear until safe climb-out is assured.
NOTE: Engine overboost should be avoided unless the
airplane continues to descend and airplane safety is in doubt.
060-4241-000 • Rev. E - December 2003
MK V & MK VII EGPWS Pilot Guide 53
Abnormal
Procedures
Mode 1
Excessive
Descent
Rates
Mode 2
Excessive
Closure to
Terrain
Mode 4
Unsafe
Terrain
Clearance
Mode 5
Descent
Below
Glideslope
If overboost is required, adjust throttles back to maximum
rated thrust as soon as safety has been assured.
Overboosting engines while at high angle of attack near
airplane stall may cause engine stall, surge, or flameout.
Maintain escape attitude and thrust and delay retracting flaps
or landing gear until safe climb-out is assured.
Partial system deactivation or compensation can be
accomplished for abnormal procedures as follows:
If steep approaches are to be performed (4º or greater) EGPWS
STEEP APPROACH should be enabled and selected for these
operations. This may be accomplished automatically by
on-board systems or manually selected by a cockpit switch.
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