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B737NG EFIS
1. B 737 NG Ground School.
See the aircraft study guide at www.theorycentre.com
The information contained here is for training purposes only. It is of a general nature it is
unamended and does not relate to any individual aircraft. The FCOM must be consulted for
up to date information on any particular aircraft.
3. Common Display System
The purpose of the CDS is to supply Navigation and Engine information to the flight crew.
The CDS uses 6 identical display units.
The computer for the CDS is the Display Electronics units (DEU) There are 2 DEU’s.
The DEU’s collect data from aircraft systems and change the data to video signals for the DU’s
The DEU’s also send data to various aircraft systems, including the engine electronic controllers
and the Flight Management computers.
5. DEU 1 Normally supplies the DEU 2 Normally supplies the
Captains Outboard DU. FO’s Outboard DU.
Captains Inboard DU. FO’s Inboard DU.
Upper DU. Lower DU.
6. Either DEU can supply all data to all 6 DU’s if required.
However it should be noted that some information is only
supplied by one DEU. As an example Hydraulic system A
passes pressure information to DEU 1. If DEU 1 fails this
information is lost.
7. SOURCE refers to the source of The DISPLAYS SOURCE select
information on the DU’s. panel is located on the forward
In AUTO with no failures both overhead panel.
DEU’s are supplying information
to the DU’s.
8. NOTE: There is only one selector on the flight deck
labelled ALL ON 1 and ALL ON 2.
There is no crew procedure to move this selector
away from AUTO.
This switch is used for Maintenance purposes only.
If a selector is labelled BOTH ON 1 or BOTH ON 2
there is a crew procedure that allows it to be moved.
9. With the SOURCE selector
set to AUTO If either DEU
fails the other DEU will
supply information to ALL 6
DU’s AUTOMATICALLY!
10. Manual selection of ALL ON 1 or
ALL ON 2 will switch off the other
DEU.
DSPLY SOURCE is shown in amber on both PFD’s when only one
DEU is supplying all of the DU’s
11. The Primary Flight Display The PFD is the ONLY thing
PFD which can be displayed on
Is normally displayed on the Outboard DU!
the outboard DU.
12. The Navigation Display
ND The ND can be
Is Normally displayed on MANUALLY selected to
the Inboard DU. the lower DU.
13. Primary Engine Indications Engine information is the
are NORMALLY displayed only information which can
on the upper DU be displayed on the upper
DU.
14. In compacted format
Secondary engine
information can be added
to the Primary information.
This happens when only 1
DU is available for Engine
information.
15. Secondary Information is
Normally displayed on the
Lower DU.
The lower DU is normally
black in flight. If a secondary
engine indication is in the
Caution Amber or Limit Red
range the indications will
appear automatically.
16. If the upper DU fails Primary
engine indications will
automatically be displayed on
the lower Display unit.
17. Pressing ENG once turns on
The lower DU is a the display. Push again blanks
Multi function display the MFD.
MFD Pushing SYS shows aircraft
The MFD is selected System information.
on the Engine control
panel above the
upper DU.
19. Captains Brightness Controls. F/O’s Brightness Controls.
Inner knob is for Weather Radar and Terrain brightness control
Because a Navigation display can be shown on the
MFD the lower DU brightness control has an inner
brightness control for Weather radar and Terrain
20. 2 Remote Light Sensors mounted on the Glare shield.
Light sensors Generally it should be
Automatically adjust necessary to adjust DU
screen brightness as brightness only once per
ambient light flight. Any light condition
conditions vary. changes should be
accommodated automatically.
Local Light Sensor
26. Selecting ENG PRI blanks the upper DU and displays Primary
Engine indications on the Inboard DU. You can only display
Primary Engine on one DU.
27. Selecting MFD will make the inboard DU an MFD it can be blank or
show Secondary Engine or Systems information as selected on the
Engine control panel.
28. If the Upper DU fails. The Primary Engine indications are
automatically displayed on the lower DU.
29. If the Upper DU fails the lower DU will normally show Primary
engine indication.
In this condition only one DU is available for Engine indications.
If ENG is selected on the engine control panel compacted
secondary engine information will be displayed.
30. NOTE: You must see Primary
engine indications. It is not possible
to display systems indications on
the lower DU if the upper DU is
failed.
If the Upper DU fails the lower DU will normally show Primary
engine indication.
In this condition only one DU is available for Engine indications.
If ENG is selected on the engine control panel compacted
secondary engine information will be displayed.
31. To see systems information you can select one inboard DU to MFD
32. Selecting ENG PRI will blank the upper DU and display engine
indications on the lower DU.
33. Selecting ENG PRI will blank the upper DU and display engine
indications on the lower DU.
Selecting ND will display either the Captains or FO’s ND on the
lower DU.
34. Selecting ENG PRI will blank the upper DU and display engine
indications on the lower DU.
Selecting ND will display either the Captains or FO’s ND on the
lower DU.
The Captain and FO may have different ND displays selected.
If both select ND the Captains ND has priority on the lower DU.
36. There are 2 EFIS control panels one for the Captain and one for the FO.
37. On the Displays Source select
panel the switch labelled
CONTROL PANEL selects
the EFIS control panels.
38. The control switch is usually in On the Displays Source select
the NORMAL selection this panel the switch labelled
allows The Left EFIS control CONTROL PANEL selects
panel to control the PFD and ND the EFIS control panels.
on the left side and the right on
the right.
39. If an EFIS control panel
should fail. Selecting
BOTH to the working
panel enables one panel
to control the Left and
Right DU’s
Can the Captains PFD and ND be controlled with this
selection?
77. SPEED REFERENCE SELECTOR
Used when the FMC speed setting is not available (FMC FAIL)
V1 and VR On the Ground
only.
Displays set speed on
PFD.
Inner knob used to set
desired speed.
78. SPEED REFERENCE SELECTOR
Used when the FMC speed setting is not available (FMC FAIL)
WT. Allows entry of Gross weight
on Ground or in Flight.
Sets the UP BUG for flap setting
79. SPEED REFERENCE SELECTOR
Used when the FMC speed setting is not available (FMC FAIL)
VREF- In flight. Allows setting
of Landing VREF
80. SPEED REFERENCE SELECTOR
Used when the FMC speed setting is not available (FMC FAIL)
Allows another manual bug to be set.
This is white and called BUG 5.
81. SPEED REFERENCE SELECTOR
Used when the FMC speed setting is not available (FMC FAIL)
SET- Displays Manually set bugs.
Speed display blanks when SET
selected
82. SPEED REFERENCE SELECTOR
Used when the FMC speed setting is not available (FMC FAIL)
SET- Displays Manually set bugs.
AUTO Speeds from FMC
96. If the amber annunciator ROLL appears on the lower Right
side of the PFD this indicates that:
97. If the amber annunciator ROLL appears on the lower Right
side of the PFD this indicates that:
The Captains and F/O’s ROLL display disagree by more
than 5°
98. If the amber annunciator ROLL appears on the lower Right
side of the PFD this indicates that:
The Captains and F/O’s ROLL display disagree by more
than 5°
The MACH digital counter at the bottom of the PFD speed
tape will display When the current MACH number is:
99. If the amber annunciator ROLL appears on the lower Right
side of the PFD this indicates that:
The Captains and F/O’s ROLL display disagree by more
than 5°
The MACH digital counter at the bottom of the PFD speed
tape will display When the current MACH number is:
MACH 0.4
101. The amber message NO VSPEEDS is displayed because?
V1 or VR is not selected on the ground.
102. The amber message NO VSPEEDS is displayed because?
V1 or VR is not selected on the ground.
What will happen during takeoff if pitch attitude reaches
the PLI indicators?
103. The amber message NO VSPEEDS is displayed because?
V1 or VR is not selected on the ground.
What will happen during takeoff if pitch attitude reaches
the PLI indicators?
Indicates STICK SHAKER ACTIVATION FOR Current conditions.
104. What can be displayed on the outboard display unit?
105. What can be displayed on the outboard display unit?
PFD ONLY
106. What can be displayed on the outboard display unit?
PFD ONLY
What Can be displayed on the Upper Display
Unit?
107. What can be displayed on the outboard display unit?
PFD ONLY
What Can be displayed on the Upper Display
Unit?
Engine Primary display or Compacted engine Display
ONLY
118. What is this called?
EFIS CONTROL PANEL
How many are there?
119. What is this called?
EFIS CONTROL PANEL
How many are there?
120. If the amber annunciator PITCH appears on the lower left side of the PFD this indicates that:
121. If the amber annunciator PITCH appears on the lower left side of the PFD this indicates that:
The captains and first officers pitch angle display varies by more than 5°
122.
123. Captains Attitude information
comes from the Left ADIRU.
First officers from the Right
ADIRU. The amber flags
indicate a disagreement
between the 2 ADIRU’s.
See IRS lesson for more
information on ADIRU.
125. EXPANDED MAP
The word expanded is not normally used.
The expanded display is referred to as
MAP or VOR or Approach.
126. MAP
Current heading
pointer
Ground speed
True Air Speed Current Track line
TAS only above 100 Knots. and Range scale
127. EXPANDED MAP
MAP
Wind Direction
Wind Speed
Wind Arrow
Displayed if wind is more
than 6 knots.
Only displayed when
TAS is above 101 Knots
Same reference as MAP
(MAG or TRU)
ACTIVE WAYPOINT
132. Tip Indicates present
position
Aircraft Symbol
VOR CTR and APP CTR Current Track
Centre Indicates Present position
Indicates Position
In PLAN mode only.
133. POSITION TREND
Indicates where the FMC
expects to be in 30, 60 or 90
seconds depending on Map
scale selected.
Each segment = 30 seconds
10 miles or less 1 segment
30 seconds
135. POSITION TREND
More than 20 miles
20 miles 2 segments 3 segments.
60 Seconds 90 Seconds
30 Seconds 60 Seconds
30 Seconds
136. Green ARC Indicates the
approximate position where
Mode Control Panel (MCP)
altitude will be reached
under current conditions.
Climbing or descending.
See the presentation Auto flight for more information on the MCP.
138. VNAV PATH POINTER
Digital numeric Display in WHITE when 30 feet from centre.
Above indication for low and below for high.
AIRCRAFT POINTER
FMC Calculated
Vertical Path. Aircraft
3120 feet high.
Displayed during
Descent only.
139. VOR Bearing Vectors
VOR symbol is
FMC generated
from navigation
database
Select Position to display.
Only available in Map and
Tip of Triangle is FMC position. MAP Centre.
VOR symbol is generated from FMC
navigation database.
140. VOR Bearing Vectors
VOR symbol is
FMC generated
from navigation
database
Select Position to display.
Only available in Map and
Green radial line is MAP Centre.
RAW DATA from
Nav Radio length is
DME to map scale.
141. The aircraft is crossing the NOT HERE This is the FMC
200 Radial of this VOR stored position only.
The VOR is actually here
as received by the
Navigation radio.
This picture represents a map shift
142. VOR MODE
A Navigation radio
must be manually
tuned to a VOR
station. CRS is set on
Left course for
navigation radio 1 and
Right course for Nav 2