737 Flight Crew Operations Manual
Flight Instruments, Displays -
PFD/ND – Controls and Indicators
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D6-27370-866-EGP 10.16.5
POS (position) – displays IRS positions, GPS positions and VOR bearing vectors
extended from the nose of the airplane symbol to the stations.
TERR (terrain) – displays GPWS generated terrain data in MAP, center MAP,
VOR, and APP modes (refer to Chapter 15, Warning Systems).
Displays Source Control Panel
Both a display source Display Electronics Unit (DEU) selector and an EFIS
control switch are located above the Captain on the forward overhead (P5) panel.
1 Displays Source Selector – DEU
Both DEUs or only one DEU can drive all six Captain and First Officer displays.
There is a SOURCE selector on the overhead panel. The selector is normally set
to the AUTO mode:
• ALL ON 1 – selects the Captain’s DEU to drive all six Captain and First
Officer displays
• AUTO – allows DEU 1 to drive the Captain outboard, Captain inboard,
and upper display units while DEU 2 drives the First Officer outboard,
First Officer inboard, and lower display units. Provides automatic
switching from both DEUs to one in case of single DEU failure
• ALL ON 2 – selects the First Officer’s DEU to drive all six Captain and
First Officer displays.
Note: These source selectors and switches are normally used while the aircraft is
on the ground for maintenance purposes.
DISPLAYS
CONTROL PANEL
BOTH BOTH
ON 2ON 1
NORMAL
SOURCE
ALL
ON 1
ALL
ON 2
AUTO
FORWARD OVERHEAD PANEL
1
2
September 15, 2016
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