Installation Considerations; Plug & Play Considerations - Avidyne IFD540 Installation Manual

2. Installation Considerations

The following section will describe installation instructions for the IFD5XX Unit. The IFD5XX
should be installed using standard industry practice while following guidance in FAA AC
43.13-( ), AC 20-138 ( ), and AC 20-67( ).
2.1 Plug & Play Considerations
The IFD5XX is designed to be a slide-in replacement for a GNS-530/W. For those
replacement installations in fixed wing aircraft, the existing aircraft tray and wiring can all be
reused. However, all electrical wiring, including power(s) and ground(s), should be verified
per installation data shown in Appendix D: Electrical Interface Drawings. Note that 14v
aircraft may be required to replace the installed circuit breaker and power and ground wiring
to accommodate the IFD5XX.
If the unit being replaced was a WAAS-enabled device, then the WAAS antennas previously
installed can be reused, assuming they are one of the GPS WAAS antennas identified in
Section 3.3.5.
If the unit being replaced was not a TAWS-enabled device, or if the TAWS Audio output
signals were not already connected to the aircraft audio panel(s), then some additional wiring
will be required from the IFD5XX tray to the aircraft audio panel(s) as identified in Section
6.11.1 in order to supply IFD5XX terrain alerting audio (FLTA functionality) and TOD chime
to the headsets. If the unit being replaced was a TAWS-enabled device used for 91/135
TAWS compliance, the IFD5XX cannot be installed without a separately installed
EGWPS/TAWS unit.
For those installations that use a combined IFD5XX – Avidyne AXP340 Mode S ADS-B
transponder, the on-ground/in-air discrete signal wire may need to be added from the
IFD5XX tray to the AXP340 tray as identified in Section 6.12.
Note: Installations replacing an existing non-WAAS GPS/NAV/COM
transceiver cannot upgrade to a WAAS installation without performing a
major alteration.
Note: Installations replacing a GNS-530/W must verify the aircraft is on the
IFD5XX Approved Model List, Avidyne Document Number AVIFD-318.
Note: It is imperative that only one source of terrain cautions and warnings be
enabled on the airplane so as to avoid the potential for conflicting
information to be presented to the pilot. If a TAWS system is installed but
the IFD's internal TA and FLTA functions are to be used for terrain
avoidance, the TAWS system must be fully disabled. If a TAWS system is
to be used, its type must be properly configured on the IFD so that the
caution and warning indications generated by the TAWS system can be
displayed to the pilot and so that the IFD's TA and FLTA functions will be
inhibited.
Avidyne TA/FLTA is not approved TSO-C151 EGPWS unit.
The IFD system supports a Honeywell KGP560/860 system only. All other
external TAWS/EGPWS systems must be disable if the internal TA and
FLTA is operational on the IFD system.
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IFD5XX Installation Manual
Revision: 02