737 Flight Crew Operations Manual
Flight Instruments, Displays Chapter 10
Head-Up Display System – Controls Section 17
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D6-27370-866-EGP 10.17.1
This Section Applies to YK981 - YQ456
17 Head-Up Display System – ControlsHead-Up Display System – ControlsFi le Highlight
Multi-purpose Display and Control Unit (MCDU)
The HUD uses the Multipurpose Display and Control Unit (MCDU) as a control
panel to control modes of operation, display values, and system test and status
information. For complete information on the MCDU refer to Chapter 11, Flight
Management, Navigation.
MCDU Displays
Either Captain’s or First Officer’s MCDU can be used to operate the Head-Up
Guidance System. HGS operation is accessible by pushing the "MENU" function
key at any time to go immediately to the Menu page. On the Menu page, push the
"HGS" line select key to open the "HGS DATA" page.
Both pilots can set HGS modes and make data entries to the HGS Computer. The
FMC automatically transfers runway data (length, elevation, and glideslope angle)
to the HGS when a pilot enters a flight plan with planned departure and arrival
runways.
When the arrival runway has not been planned, pilots can set HGS modes and
make manual data entries for touchdown zone elevation, runway length, and
reference glideslope angle. When manually inputting data, push the MCDU
"CLR" key to erase existing values. Use the numeric keypad to record the new
data. When the new data shows correctly on the screen, push the corresponding
line select key to enter the data into the MCDU.
Pilots can also push the "<CLR HGS" line select key on the MCDU HGS Data
page to remove all symbology from the Combiner display.
September 15, 2016
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