ADS-B FDL-978 Series and
Lite Series Installation Manual
Document No. 87343 Rev G
FFS Copyright © 2016 All rights reserved.
12-7
12.4 Installation
This section provides general information for installing the FDL-978 Lite Series into an aircraft.
This section contains mounting dimensions, pin outs, and interface details pertaining to
installation. Adherence to these installation procedures and information will assure satisfactory
system performance. Note that several sections below refer to paragraphs in Section 2 that are
common with the FDL-978 Series.
FAA AC 20-165A requires certified installations with ADS-B Out Transmitters
(FDL-978 Lites Series) and any transponder on the aircraft to transmit pressure
altitude data obtained from the same altitude source. Installations must therefore
ensure that the transponder and FDL-978 Lites Series receive altitude data from
the same altitude source.
FAA AC 20-165A HIGHLY recommends that the ADS-B transmitter and
transponder share a single point of entry for Mode A (Squawk Code) and IDENT.
Dual entry installations are allowed but discouraged and must ensure that the
transponder and UAT transmit the same Mode A and IDENT without increased
pilot workload. Garmin Series transponders (GTX-330/327/32/33) must be
connected to the GTX-REMOTE Input port on the FDL-978 Lites Series to control
Mode A code and IDENT. Mode A/C transponders will automatically use the FDL-
978 Lites Series internal Mode A receiver to monitor the on-board transponder
transmissions to set Mode A code and IDENT. Mode A receive is not compatible
with Mode S transponders.
12.5 Unpacking and Inspecting Equipment
Refer to Section 2.1 - Unpacking and Inspecting Equipment.
12.5.1
Equipment Mounting
Refer to Section 2.2- Equipment Mounting.
12.6 Cooling Requirements
Refer to Section 2.3 - Cooling Requirements.
