190-01717-B1
G500/G600 TXi Part 23 AML STC Maintenance Manual
Rev. 1
Page 2-10
The GCU 485 installation is optional.
Figure 2-8 GCU 485 (P/N 011-03582-01 Shown)
2.2.5
Backup GPS Antenna
GDU 1060 and GDU 700 PFD and MFD displays have an optional backup GPS. If a backup GPS antenna
is installed, the backup GPS is automatically used when the primary GPS source is lost. The backup GPS
antenna is located on the instrument panel glare shield.
Figure 2-9 Garmin Backup GPS Antenna
2.2.6
Integrated ADAHRS Unit
The GDU 1060/700P has an optional integrated ADAHRS unit that provides flight altitude, vertical speed,
airspeed, attitude, OAT, and heading data for flight instrumentation. The AHRS portion is contained
internally within the GDU 1060/700P. An Integrated ADC module is then plugged in to the AHRS board
and attached to the back of the GDU 1060/700P. The internal ADAHRS receives data from the GMU 44
and GTP 56 that are connected to the GDU 1060/700P. The integrated ADAHRS utilizes GPS signals sent
from the GPS/SBAS navigator. Attitude, heading, and air data can be sent using ARINC 429 digital signals
to external LRUs and the GAD43/43e.
