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alert or extinguish the light while the alert is occurring.
Aural Alert Light Alert Calls Attention To:
Bell
(Silence by pushing Master
WARNING/CAUTION
Reset switch.)
Master WARNING lights
(Extinguish by pushing
Master
WARNING/CAUTION
Reset switch.)
EICAS warning message:
APU FIRE
FIRE CARGO AFT, FWD
FIRE ENG
FIRE WHEEL WELL
Aural Alert Light Alert Calls Attention To:
Siren
(Silence by pushing Master
WARNING/CAUTION
Reset switch.)
Master WARNING lights
(Extinguish by pushing
Master
WARNING/CAUTION
Reset switch.)
EICAS warning message:
CABIN ALTITUDE
CONFIG FLAPS
CONFIG GEAR
CONFIG PARK BRK
CONFIG SPOILERS
CONFIG STAB
PILOT RESPONSE
Aural Alert Light Alert Calls Attention To:
Wailer Master WARNING lights
(Extinguish by pushing
Master
WARNING/CAUTION
Reset switch.)
EICAS warning message
AUTO PILOT
Aural Alert Light Alert Calls Attention To:
Siren Master WARNING lights
(Extinguish by pushing
Master
WARNING/CAUTION
Reset switch.)
EICAS warning message
OVERSPEED
April 01, 2001
747 Operations Manual
Warning Systems -
System Description
Copyright © The Boeing Company. See title page for details.
D6-30151-425 15.20.5
Flight Deck Panel Annunciator Lights
Flight deck panel annunciator lights are used with EICAS messages to:
• help locate and identify affected systems and controls
• reduce potential for error.
Airspeed Alerts
StallWarning
Warning of an impending stall is provided by left and right stick shakers, which
independently vibrate the left and right control columns.
Airspeed Low
The EICAS caution message AIRSPEED LOW is displayed and the box around
the current airspeed indication on the PFD is highlighted amber when airspeed is
below minimum maneuvering speed.
OverspeedWarning
The EICAS alert message OVERSPEED is displayed if VMO/MMO is exceeded.
The message remains displayed until airspeed is reduced below VMO/MMO.
The EICAS memo message VMO GEAR DOWN is displayed when gear down
dispatch has been selected in the electronics bay. When gear down dispatch is
selected, the VMO/MMO calculated by the ADC are based on maximum gear
extended speed.
The EICAS memo message VMO SPARE ENGINE is displayed when spare
engine dispatch has been selected in the electronics bay. When spare engine
dispatch is selected, the VMO/MMO calculated by the ADC is based on
maximum spare engine carriage speed.
Takeoff And Landing ConfigurationWarning System
The takeoff and landing configuration warning system alerts the crew that the
airplane is not configured for a normal takeoff or a normal landing.
Aural Alert Light Alert Calls Attention To:
Beeper Master CAUTION lights
(Extinguish by pushing
Master
WARNING/CAUTION
Reset switch.)
New EICAS caution
message, except:
ENG SHUTDOWN
April 01, 2001
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
15.20.6 D6-30151-425
Warning Systems -
System Description
The warning system also provides takeoff and landing configuration and stall
warnings.
Takeoff ConfigurationWarnings
The respective EICAS alert message CONFIG is displayed if:
• airplane is on the ground, and
• FUEL CONTROL switches are in RUN position, and
• engine two or three thrust is in takeoff range, and
• airspeed is less than V1, and
• any of the following configurations exist;
• flaps not in a takeoff position, or
• body gear not centered, or
• parking brake is set, or
• Speedbrake lever not in DN detent, or
• stabilizer trim not in takeoff range
Takeoff configuration warnings are inhibited at V1.
If engine 2 and 3 thrust is decreased below takeoff range and airspeed is less than
V1 but the airplane is still not configured for takeoff, theMasterWARNING lights
extinguish and the siren is silenced. The CONFIG messge remains displayed until
the airplane is configured for a normal takeoff.
Landing Configuration Warning
The landing configuration warning system alerts the crew the landing gear is not
extended for landing. The EICAS warning message CONFIG GEAR is displayed
if:
• the airplane is in flight, and
• any landing gear is not down and locked, and
• any of the following configurations exist;
• any Thrust lever is closed and radio altitude is less than 800 ft, or
• Flap lever in a landing position (Flaps 25 or Flaps 30)
　
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