Aspen Avionics Evolution EFD1000 VFR PFD - Page 138

CHAPTER 4 REFERENCE GUIDE
EFD1000 VFR PFD Pilot’s Guide
Page 4-48
091-00028-001 ( )
With GPSS enabled on the PFD and the autopilot in HDG mode, the GPSS will steer
the autopilot laterally through the ight plan using GPS, even after the GNS-430 CDI
automatically switches to VLOC, and the PFD navigation source similarly switches
to VLOC.
Several conditions can cause GPSS to be disabled automatically (switching to a dierent
GPS steering source on the PFD, losing the GPS navigator source, canceling the ight
plan, etc.). If this happens, the PFD will send a Wings Level command to the autopilot
when in HDG mode, the GPSS Hot Key will annunciate the condition by showing
GPSS in inverse amber, and the GPSS# and inverse A annunciation at the top of the
Navigation Display will be shown with a red slash. (See Figure 4-112). To re-engage
GPSS, select a valid GPS navigation source (with valid ight plan or direct-to selection
on the GPS navigator), and then press the GPSS Hot Key. If a valid GPSS signal cannot
be restored, pressing the GPSS Hot Key will cancel GPSS mode and restore the Heading
Bug’s output to the autopilot. More detail on these abnormal conditions, and corrective
pilot actions, can be found in Chapter6,ExpandedEmergencyandAbnormal
Procedures. See also Chapter4,Section4.7.3.TypicalAutopilotOperations.
WARNING
It is your responsibility as Pilot in Command to ensure
that you are familiar with the operation of all installed
equipment. Operation of the PFD in IMC conditions
should not be attempted unless you are procient in its
use and operation, as describedherein.
NOTE
Refer to the autopilot systems Aircraft Flight Manual
Supplement and/or POH for details regarding use and
operation of the autopilot system.
Examples here are provided for reference only, actual
operation may vary depending on the autopilot system
installed in your aircraft.