ALT rate is less than 5 feet per second
At this time, the altitude select (ALT SEL) mode will
be dropped and the system will be placed in the altitude
hold (ALT) mode.
The ALT SEL CAP mode will be dropped and the ALT
SEL ARM mode will be automatically reselected following
an ALT SEL knob motion or a pitch wheel actuation
Perform the following steps to fly to a preselected altitude
using the altitude select mode (ALT SEL):
Set selected altitude on altitude
Select pitch hold, VS, or IAS mode
descend or ascend toward selected
Depress ALT SEL pushbutton switch-
indicator on flight director mode selector
panel. ALT SEL mode is now armed.
The altitude flare point (ALT SEL CAP) is a nonlinear
function, dependent upon vertical speed and distance to
the selected altitude.
ALT SEL capture is dropped and ALT
HOLD is automatically engaged.
The ALT SEL capture submode is cancelled by:
Moving the ALT SET knob on the altitude preselector
Moving the pitch wheel on the autopilot controller
Selecting on or captured any other vertical mode
Coupling to the cross-side EFIS
Selecting an alternate ATT source on the display
Go-around mode (wings level). The go-
around mode is normally used to transition from an
approach to a climb when a missed approach has
occurred. Go-around mode is selected by depressing the
go-around switch located on the left power lever. With
cancelled, and the autopilot is disengaged The pilot will
see a wings level command and a 7-degree climb angle
will be presented on the EADI. When go-around is
selected, the autopilot will automatically disengage, and
the yaw damper will automatically engage.
VHF NAVIGATION RECEIVERS (VIR-32).
Introduction. The VHF navigation receivers (fig.
3-24), provide 200 50-kHz spaced VOR/localizer channels
from 108.00 through 117.95 MHz, 40 glide slope channels
automatically paired with localizer channels, and a marker
beacon receiver. The digital navigation receiver provides
VOR, LOC, and GS deviation outputs, high and low level
flag signals, magnetic bearing to the station, to/from
information, marker beacon lamp signals, and VOR and
marker beacon audio outputs. The navigation receivers
are powered through the 2-ampere VOR # 1 and VOR #2
circuit breakers, located on the overhead circuit breaker
panel (fig. 2-7).
VHF Navigation Receiver Control Unit Controls
and Functions. All operating controls for the navigation
receiver are located on the CTL-32 navigation receiver
control unit (fig. 3-24). The VHF navigation receiver
control unit also controls the DME function of the TACAN
when it is operated in DME mode.
frequency (frequency to which the receiver is tuned) and
diagnostic messages are displayed in the upper window.
(2) Transfer/memory switch. This switch is a 3-
position spring-loaded toggle switch placarded XFR/
MEM, which, when held to the XFR position, causes the
preset frequency to be transferred up to the active display
and the receiver to be retuned. The previously active
frequency will become the new preset frequency and will
be displayed in the lower window. When this switch is
held to the MEM position, one of the four stacked memory
frequencies will be loaded into the preset display.
frequencies through the display.
(3) Store switch. This switch, placarded STO,
allows up to four preset frequencies to be selected and
entered into the control unit's memory. After presetting
the frequency to be stored, the STO switch should be
pushed. The upper window displays the channel number
of available memory channel (CH 1 though CH 4) while
the lower window continues to display the frequency to be
stored For approximately 5 seconds, the MEM switch may
be used to advance through the channel numbers without
changing the preset display. The STO switch is pushed a
second time to commit the preset frequency to memory in
the selected location After approximately 5 seconds, the
control will return to normal operation.
(4) Tuning knobs. Two concentric tuning knobs
control the preset or active frequency displays. The
larger knob changes the three digits to the left of the
decimal point in 1-MHz steps. The smaller knob changes
the two digits to the right of the decimal point in 0.05 MHz
independent of each other so that the upper and lower
rollover of the 0.1 MHz digit will not cause the 1.0 MHz
digit to change.