Garmin G1000 NAV III Line Maintenance Manual page 15

G1000 Nav III Line Maintenance Manual
190-00352-00
GSA 81 & GSM 85: The GSA 81 servo actuator is an electromechanical LRU
that provides automatic control of pitch, roll, and pitch trim. It also provides
manual electric trim functionality. The GSA 81 contains a motor-control and
monitor circuit board, as well as a solenoid and a brushless DC motor. The GSA
81 receives serial RS-485 data packets from the GIA 63Ws.
The GSM 85 servo mount is mounted to the aircraft structure, via a custom
mounting bracket, and is responsible for transferring the output torque of the
GSA 81 servo actuator to the mechanical flight-control surface linkage.
The GTP 59 OAT Probe provides outside air temperature measurement
GTP 59:
which is used by the GDC 74A. Communication interface to the G1000 is
through the GDC 74A.
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