MD-11 Flight Crew Operations Manual
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Warning and Alerting -
Controls and Displays
Warn.30.5
GPWS/EGPWS Controls/Indicators
1. BELOW G/S Switch - Amber
Illuminates to indicate corrective action required due to excessive deviation
from glideslope. Light is accompanied by GLIDESLOPE voice warning. G/S
INHIBIT will illuminate when the switch is pushed and the warnings are
inhibited.
2. TERRAIN OVRD Switch
Push to illuminate the blue OVRD legend and disable the enhanced features
during takeoff, approach or landing with any of the following:
• Airport has no approved instrument approach procedure.
• Longest runway is less than 3,500 feet.
• Airport is included in the current list of airports with insufficient data for
correct EGPWS operation.
Basic GPWS modes are not affected. Enhanced features can also be disabled
automatically by the EGPWS computer.
3. GPWS Switch
FLAP OVRD - GPWS is prevented from actuating during a landing with
flaps not in landing configuration.
NORM - GPWS annunciates dangerous situations and remains silent during
normal flight conditions.
GPWS
FLAP OVRD
NORM
TEST
LB1-3-0194
TERRAIN OVRD
OVRD
AFT OVERHEAD PANEL, RIGHT SID
GLARESHIELD, LEFT AND RIGHT SIDE
BELOW
G/S
G/S
INHIBIT
1
2
3
October 02, 2006
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