190-01717-B1
G500/G600 TXi Part 23 AML STC Maintenance Manual
Rev. 1
Page 2-11
2.2.7
GSU 75() ADAHRS Unit
The GSU 75/75B ADAHRS is a remote LRU that provides flight altitude, vertical speed, airspeed, attitude,
OAT, and heading data for flight instrumentation. The GSU 75 / 75B receives data from the GMU 44
magnetometer and GTP 59 OAT probe. The GSU 75 / 75B utilizes GPS signals sent from the GPS/SBAS
navigator. Attitude, heading, and air data is sent using ARINC 429 digital signals to the GDU 1060/700P
and GAD 43/43e. An RS-232 digital connection is used for maintenance and configuration information.
The GSU 75B is configured through the GDU 1060/700P using a feature unlock card that contains
airframe specific air data corrections suitable for RVSM functionality in select applications.
Figure 2-10 GSU 75() ADAHRS Unit
2.2.8
GRS 79 AHRS Unit
The GSU 79 AHRS is a remote LRU that provides attitude and heading data for flight instrumentation. The
GSU 79 receives data from the GMU 44 magnetometer. The GSU 79 utilizes GPS signals sent from the
GPS/SBAS navigator. Attitude and heading data is sent using ARINC 429 digital signals to the GDU 1060/
700P and GAD 43/43e. An RS-232 digital connection is used for maintenance and configuration
information.
Figure 2-11 GRS 79 AHRS Unit
