737 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Preflight
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11.40.50 D6-27370-866-EGP
2 Other Aircraft Subsystems (typical)
Push – selects the subsystem for which the MCDU will be active in providing
control/display function.
3 XXXXXX HOLD/LOGOFF
Push - places active subsystem on hold or logs off subsystem and returns control
to the FMC.
YK981 - YQ456
4 Head Up Guidance System (HGS)
Push - selects HGS DATA page.
Refer to Chapter 10, Flight Instruments for system description.
September 15, 2016