2-5-18. Command Select Switch.
The CMD SEL switch is on the pilot and copilot HSI
MODE SELECT panel (Chapter 3). The switches are
used to select the HSI which will provide the refenced
heading when the HDG switch is engaged. Only one
CMD SEL switch may be selected at a time. If the other
CMD SEL switch is selected during heading select op-
erations, the HDG switch on the AFCS panel will disen-
gage and heading select will be disabled until the HDG
switch is again pressed. When selected, the SEL legend
on the switch illuminates.
Figure 2-5-4. Forward and Aft Cyclic Trim