Aspen Avionics Evolution EFD 1000 C3 Pro PFD - Page 102

CHAPTER 3 FLYING THE EFD1000 C3 PRO PFD
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091-00019-001 REV B
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091-00019-001 REV BEFD1000 C3 Pro PFD Pilot’s Guide
Even though the PFD Navigation Source for the CDI has switched to VLOC1 and the ILS,
and the CDI, LDI and VDI are showing deviations relative to the localizer and glideslope,
we still have GPSS Enabled with the autopilot in HDG mode. We are not yet ying the
ILS, required for this approach. GPSS is still shown in the inverse green label next to the
GPSS Hot Key, and GPSS1 and an inverse A are still shown at the top of the Navigation
Display where the numerical HDG value is usually shown.
The PFD, permits GPSS to be enabled even when VLOC is selected as the CDI Navigation
Source.
Whenever GPSS is enabled on the PFD, and the autopilot is in HDG mode, the autopilot
will y the GPS ight plan. The autopilot must be switched to APPR mode in order to y
the VLOC source selected for the CDI and to capture and track the glideslope of an ILS,
or even an RNAV approach with vertical guidance.
A couple of miles outside the FAF (TAKLE), we switch to APPR mode on the autopilot,
which begins to track the localizer and is armed for glideslope capture. At this point, we
could Disable GPSS on the PFD by pressing the Hot Key to remove potentially confusing
annunciations on the PFD, but we know our equipment well. We understand fully that
GPSS is just another form of HDG as far as the autopilot is concerned, and the autopilot
will not y GPSS unless it is in HDG mode. So we leave GPSS enabled on the PFD,
planning to use it to y the Missed Approach if necessary.
With that setup, if we have to y the Missed Approach, we’ll do so by hitting Go Around
mode on the autopilot and climbing straight ahead to 6,700 feet. Then we’ll press the
OBS button on the GPS to allow the missed approach ight plan to sequence. Engage
the autopilot in the HDG mode and begin the climb out. With GPSS still enabled, the
autopilot will navigate the aircraft directly to the FMG VOR. If the GPS supports curved
ight plans, such as a WAAS GPS, the autopilot will automatically enter and y the hold
for us. All we have to do is level o when reaching 11,000 feet - and if we had Altitude
Pre-Select on the autopilot, it would even do that for us, too!
CAUTION
The Garmin 400/500 series navigators continue to
output GPS Steering commands to follow the GPS flight
plan even when the CDI source is set to VLOC.
The PFD permits GPSS to be enabled even when VLOC is
selected as the CDI navigation source.
Whenever the GPSS is on and the autopilot is in the
HDG mode, the autopilot will fly the GPS flight plan. The
autopilot must be switched to APPR mode in order to fly
the VLOC source selected on for the CDI and to capture
and track the glideslope of an ILS or even an RNAV
approach with vertical guidance.