Instruction Manual

Instructions for Continued Airworthiness 190-01190-11 Rev. 1
for G500H in Robinson R44 Series Rotorcraft Page 5 of 20
Garmin 005-W0227-07 Rev. 1 “G500H
ROBINSON R44 SERIAL ALTITUDE HARNESS
ASSY DWG (OPTL)” or later revision
Garmin 005-W0227-08 Rev. 1 “G500H
ROBINSON R44 TRAFFIC HARNESS ASSY DWG
(OPTL)” or later revision
Garmin 005-W0227-09 Rev. 1 “G500H
ROBINSON R44 GLARESHIELD HARNESS ASSY
(REQD)” or later revision
Garmin 190-01190-00, Rev 2, “G500H ROBINSON
R44 INSTALLATION DRAWING” or later revision
Retention: This document, or the information contained within,
will be included in the rotorcraft’s permanent
records.
2.2 Description of Alteration
This STC upgrades existing avionics for the Robinson R44 series rotorcraft as summarized below.
The Garmin G500H Flight Display System consists of an instrument panel mounted GDU 620 display
and remote mounted LRUs which provide data to the display. The GDU 620 provides controls for the
G500H system and of a Primary Flight Display and Multifunction Display in the pilot’s primary field of
view. Remote mounted LRUs include one GRS 77H AHRS, one GMU 44 Magnetometer, one GDC 74H
ADC, and one GTP 59 OAT probe.
Rotorcraft modified under this G500H STC are restricted to VFR only. To clarify this operation limitation,
a placard with the text, “THIS ROTORCRAFT IS APPROVED FOR DAY AND NIGHT VFR
OPERATIONS” is required to be in the pilot’s view.
All installed G500H equipment is connected to a power bus that receives power as soon as the battery
master switch is turned on.
Separate circuit breakers have been installed in the circuit breaker panel for the GDU 620 (PFD), GRS
77H / GMU 44 (AHRS), and GDC 74H (ADC) as circled below:
HYD GOV ALT GAGES
AUX
FUEL PUMP
AUX
PWR
HORN
START
CLUTCH
START
WARN
LTS
R E
TACHS
GPS 1 AVIONICS
FAN
XPDR AUDIO COM 2
DME
COM 1
NAV
STROBE LTS LAND LT
CARGO RMT RLS
A/C
AHRS
ADC
MKR
BEACON
PITOT
HEAT
PFD