737 Flight Crew Operations Manual
Flight Instruments, Displays -
PFD/ND – System Description
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
10.21.2 D6-27370-866-EGP
DISPLAYS SOURCE Panel
The DISPLAYS source panel, located on the forward overhead panel, contains
source controls for the display electronic units (DEUs) and EFIS control panels.
Two DEUs receive data from sensors and airplane systems and supply data to the
DUs. During normal operation, with the display SOURCE selector switch in the
AUTO position, DEU 1 supplies data to the Captain outboard, Captain inboard
and upper DUs while DEU 2 supplies data to the First Officer outboard, First
Officer inboard and lower DUs. If a DEU fails, the remaining DEU automatically
supplies data to all six displays. A single DEU failure will continue to supply each
pilot with flight instrument information from independent sources. Each DEU
receives data from both ADIRUs.
The display SOURCE selector, used on the ground for maintenance purposes,
allows manual selection of either DEU 1 or DEU 2 for all six display units. If the
displays are automatically or manually switched to a single DEU source, a
“DSPLY SOURCE” annunciation illuminates on the primary flight displays.
The CONTROL PANEL select switch determines which EFIS control panel
controls the pilots’ display functions. This switch should remain in NORMAL.
With the switch positioned to either BOTH ON 1 or BOTH ON 2, the selected
EFIS control panel provides inputs for both sets of pilot displays.
NORMAL
ON 1
BOTH
BOTH
ON 2
OUTBD
CAPT CAPT
INBD
ENGINE
F/O
INBD
F/O
OUTBD
ALL
ON 2
ALL
ON 1
AUTO
SOURCE
DISPLAYS
CONTROL PANEL
DEU 1
DEU 2
AIRPLANE SENSORS AND SYSTEMS
September 25, 2009
To Next Page
Loading...
