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switch selected on.
TCAS mode (B)
All Indicates TCAS computer
is not computing RAs.
Displays whether TFC
switch selected on or off.
TCAS mode (B)
All Indicates TCAS is
operating in test mode.
Displays whether TFC
switch selected on or off.
TCAS mode (A)
MAP, MAP
CTR, APP,
VOR
Displays when TCAS/ATC
mode switch is not in TA
ONLY or TA/RA, when
traffic is selected. Not
displayed if TCAS is failed.
TCAS mode (A)
MAP, MAP
CTR, APP,
VOR
Indicates TCAS failure,
when traffic is selected.
Symbol Name ND Mode Remarks
OFFSCALE
TFC
TA ONLY
TCAS TEST
TCAS OFF
TCAS FAIL
April 1, 2000
747 Operations Manual
Flight Instruments, Displays -
Navigation Displays
Copyright © The Boeing Company. See title page for details.
D6-30151-425 10.40.19
Radar
Symbol Name ND Mode Remarks
Weather radar (WXR)
test mode (A) (B)
MAP, MAP
CTR, APP,
VOR
Weather radar system
selected on EFIS control
panel (refer to Chapter 11,
Flight Management,
Navigation).
WXR precipitation
only mode (B)
WXR and turbulence
mode (B)
WXR receiver gain
(B)
Mode used with
down–tilt, when
ground mapping (B)
WXR antenna tilt (B)
WXR antenna failure
(A)
IRS stabilization
signal failure (A)
AUTOMATIC gain
control failure (A)
WXR control panel
failure (A)
WXR receiver
transmitter failure (A)
TEST
WXR
WX+T
CAL
MAP
+15
to
-15
ANT
ATT
WEAK
CONT
RT
April 1, 2000
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
10.40.20 D6-30151-425
Flight Instruments, Displays -
Navigation Displays
Intentionally
Blank
October 1, 2000
747 Operations Manual
Flight Instruments, Displays Chapter 10
EICAS Messages Section 50
Copyright © The Boeing Company. See title page for details.
D6-30151-425 10.50.1
Flight Instruments, Displays EICAS Messages
Note: OVERSPEED warning and ALTITUDE ALERT caution messages are
covered in Chapter 15, Warning Systems.
The following EICAS messages can display.
Flight Instrument Source EICAS Alert Messages
Flight Instrument Disagree EICAS Alert Messages
Message Level Aural Condition
>SNGL SOURCE
RA
Advisory Both pilots displays referenced to the same
radio altimeter.
>SOURCE
SELECT ADC
Advisory Both pilots displays referenced to the same
ADC source.
>SOURCE
SELECT EIU
Advisory Both pilots displays referenced to the same
EIU source.
>SOURCE
SELECT F/D
Advisory Both pilots displays referenced to the same
FCC source.
>SOURCE
SELECT IRS
Advisory Both pilots displays referenced to the same
IRU source.
>SOURCE
SELECT NAV
Advisory Both pilots displays referenced to the same
NAV source.
Message Level Aural Condition
ALT DISAGREE Caution Beeper Captain’s and F/O’s uncorrected
barometric altitudes differ more than two
hundred feet for more than five seconds.
Message Level Aural Condition
>ATTITUDE Caution Beeper Captain’s and F/O’s PFD attitude
indications differ.
Message Level Aural Condition
>BARO
DISAGREE
Advisory Captain’s and F/O’s barometric reference
settings differ for more than one minute.
April 01, 2001
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
10.50.2 D6-30151-425
Flight Instruments, Displays -
EICAS Messages
Flight Instruments Components EICAS Alert Messages
Message Level Aural Condition
IAS DISAGREE Caution Beeper Captain’s and F/O’s airspeed indicators
differ more than five knots for more than
five seconds.
Message Level Aural Condition
>EFIS CONTROL
L, R
Advisory (CDU-152) EFIS control panel
inoperative.
(CDU-161) EFIS control panel inoperative
or CDU control of the EFIS control panel
is active.
Message Level Aural Condition
>EFIS/EICAS C/P Advisory (CDU-152) Both EFIS control panels and
EICAS display select panel inoperative.
(CDU-161) Both EFIS control panels and
EICAS display select panel inoperative or
CDU control of both EFIS control panels
and EICAS display panel is active.
Message Level Aural Condition
>EIU LEFT Advisory Left EIU has failed. Inhibited in flight.
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