EFD1000 Installation Manual
DOCUMENT # A-01-126-00 PAGE 36-225 Revision H
© Copyright 2009 Aspen Avionics Inc.
then it may be necessary to keep the existing compass system in the aircraft and move
the indicator to another location.
A magnetic direction indicator “whisky compass” or equivalent is required as a
secondary direction indicator per FAR 23.1311(a)(5).
5.2.4 Back Up Nav Indicator
For certification reasons a backup navigation indicator is required for at least one type
of operation for which the aircraft is certificated. This means that in any installation in
an aircraft certified for IFR where the EFD1000 is the only display of navigation
information in the cockpit, a backup navigation indicator is required. This will ensure
that a failure of the EFD1000 system does not result in a complete loss of all
navigation data to the flight crew. A backup navigation indicator is not required for an
EFD1000 installation in aircraft limited to VFR.
Thus, for example, an installation that includes a panel mount GPS with an integral LCD
display that includes a CDI indicator would not require a backup nav indicator.
However, a configuration with no GPS and dual legacy VLOC radios that do not include
an integral display with CDI indications will require a backup nav indicator.
If there is already a dedicated indicator wired to an existing NAV Receiver or GPS then
it can be paralleled to the ACU as shown in Section 9.
WARNING: Failure to provide a backup Nav indicator when required will violate
the STC.
Garmin SL-30 Interface
The SL-30 can be connected to the EFD1000 in one of two ways. The Resolver
configuration is preferred.
Resolver:
The composite output from the SL-30 to the PFD will become invalid
whenever VOR monitor mode or localizer back course is selected on the SL-30. The
navigation source will show as failed on the PFD if either of these two modes is entered
and the SL-30 is the selected navigation source. If connected, the backup NAV
indicator will continue to function if either of these two modes is selected.
Converter:
VOR monitor mode or localizer back course mode are disabled from
selection on the SL-30. A backup NAV indicator (GI-106) cannot be connected without
a KN-72 between the SL-30 and indicator due to the fact that the OBS resolver inputs
become invalid with this configuration.
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