97-20 Radar Altimeter Installation
A. Description
The FreeFlight RA-4500 radar altimeter has ARINC 429 output for communication
with electronic displays such as the G500H EFIS system. Radar altitude data can be
displayed on the PFD portion of the Garmin GDU 620 display.
B. Schematic
Refer to Figure 98-13 for Radar Altimeter Installation electrical schematic.
C. Removal
RAD-40 Indicator
1. Turn battery & avionics switches off and pull out RADAR ALT (2 amp) circuit
breaker on circuit breaker panel.
2. Remove perimeter screws securing instrument face to upper console and carefully
pull face aft, or remove Garmin GDU 620 Display per § 95-70.
3. a. For Above-Console Installation: Remove hardware securing B560 enclosure
assembly to instrument console and remove hardware securing B560 faceplate
to RAD-40 Indicator.
b. For In-Console Installation: Supporting RAD-40 indicator, remove hardware
securing B421-1 visor assembly, A590-4 cover plate, and indicator to
instrument face.
4. Disconnect console harness from indicator and carefully remove indicator.
ATG-410 Tone Generator
1. Turn battery & avionics switches off and pull out RADAR ALT (2 amp) circuit
breaker on circuit breaker panel. Open instrument console or remove Garmin
GDU 620 Display per § 95-70.
2. Supporting ATG-410 tone generator, remove screws securing tone generator to
keel panel. Carefully remove tone generator and disconnect console harness.
RA-4000/RA-4500 Radar Altimeter
1. Turn battery & avionics switches off and pull out RADAR ALT (2 amp) circuit
breaker on circuit breaker panel. Hinge front left seat forward.
2. Disconnect airframe and antenna harnesses from RA-4000/RA-4500 radar
altimeter.
3. Supporting radar altimeter, remove screws securing radar altimeter to F542-2
support. Carefully remove radar altimeter from under left seat.
APR 2019 Chapter 97 Avionics Page 97.9
To Next Page
