Section 7
Description of the Airplane and Systems
Columbia 400 (LC41-550FG)
RC050002
Initial Issue of Manual: November 10, 2004
7-42
Latest Revision Level/Date: -/11-10-2004
The reference bugs’ status and the flight director steering command bars will indicate when
Entegra
is coupled with the autopilot. A solid magenta Heading, Altitude, or VSI bug indicates
that the function is currently coupled to an active mode of the autopilot. A hollow magenta bug
indicates that the function is not currently coupled to the autopilot in an active mode. In other
words, a hollow bug indicates manual or “hand-flying” status.
When a vertical mode is being used, a green set of flight director command bars will indicate the
required steering of the aircraft to achieve the commanded tracking from the autopilot.
The following is a description of the six autopilot modes supported by the Entegra
PFD. The
autopilot may only be coupled to the GPS/NAV selected as the PFD Nav source. The autopilot
may not be coupled to the GPS/NAV selected as the PFD Bearing source.
Horizontal Modes
1.
Heading Capture/Hold Mode –
Press the Hdg Bug button on the PFD, and rotate the right
knob to set a desired heading. Press the HDG button on the autopilot control head to engage
heading mode. At this point, the heading bug will become solid magenta and the autopilot
will track the input heading. The autopilot control head and the PFD will indicate “HDG”.
The heading bug will remain solid magenta until heading mode is cancelled. Select a new
heading at any time while the autopilot is in heading mode and the autopilot will track the
new heading bug value.
2.
Nav/Apr Mode –
Press the NAV button on the autopilot control head to engage Nav mode.
The autopilot will intercept and track the desired course. In this mode, the autopilot tracks
the active plan of the selected GPS/NAV (Nav = GPS1 or GPS2) or an active VOR or
localizer (Nav = VLOC1 or VLOC2). The autopilot control head and the PFD will indicate
“NAV”. If a localizer is selected, the autopilot will automatically select APR mode. Both the
autopilot control head and the PFD will annunciate “NAV APR”. Glideslope capture is
supported while in “NAV APR ALT” mode. In “NAV/APR” mode, the heading bug will be
hollow and remains at its last set value, which is not necessarily aligned with the Nav
course.
3.
GPS Roll Steering Mode –
In this mode, the autopilot tracks the active flight plan of the
selected GPS/NAV (Nav = GPS1 or GPS2). Press the NAV button on the autopilot control
head twice to engage GPSS mode. The autopilot will then begin tracking the GPS steering
commands from the selected GPS/NAV. The autopilot control head and the PFD will
indicate “GPSS”. Use of GPSS mode is recommended during GPS navigation, including
GPS and GPS-overlay approaches due to its increased accuracy. In this mode, the heading
bug will be hollow and remains at its last set value, which is not necessarily aligned with the
Nav course.
CAUTION
If a VLOC is selected in NAV on the PFD and GPSS mode is engaged on the
autopilot, the autopilot will track the active flight plan in GPS1 if VLOC1 is
selected or GPS2 if VLOC2 is selected and not track VLOC1 or VLOC2 as
the selected source in NAV on the PFD. Therefore the course deviation on the
PFD CDI and the course deviation flown by the autopilot can be different.
This situation may be confusing and should be avoided. During this