G300 Installation Manual – GSU 73
Page 4-1
190-00921-01
Revision A
4
GSU 73
4.1
Equipment Description
The GSU 73 is intended for the OEM LSA (light sport aircraft) and experimental aircraft markets. The
Garmin GSU 73 Sensor Unit is not a TSO-certified product and has received no FAA approval or
endorsement. The GSU 73 is intended to be used as a part of the G300, and it is not suitable for certified
configurations.
The GSU 73 is an LRU that provides AHRS and Air Data information as well as an interface to
Engine/Airframe sensors in a single mechanical package. The GSU 73 interfaces to a remote mounted
GMU 44 for heading information and also computes OAT and TAS from inputs provided by the GTP 59.
The GSU 73 is capable of maneuvers through a range of 360° in bank and pitch. The rotation rate
capability is ±200° per second.
Bank error and pitch error are within
±
1.25° over the range of 30° bank, left and right, and 15° pitch nose
up and nose down. Heading is accurate to within 2° in straight and level flight.
Operation is not authorized north of 70° North latitude nor south of 70° South latitude due to unsuitability
of the magnetic fields near the Earth’s poles. In addition, operation is not authorized in the following two
regions:
1)
North of 65° North latitude between longitude 75° W and 120° W. (Northern Canada)
2)
South of 55° South latitude between longitude 120° E and 165° E. (Region south of Australia and
New Zealand)
Figure 4-1. GSU 73 Unit View
