Gsm 85A Servo Gear Box; Gtp 59 Oat Probe; Gcu 478 Remote Controller - Garmin CIRRUS PERSPECTIVE SR20 Line Maintenance Manual

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2.11.3 GSM 85A Servo Gear Box
The GSM 85A Servo Gear Box is used with a Garmin GSA 80 or GSA 81 (GSA 8X) servo actuator
to control one axis of flight control, or its associated trim, as part of the GFC 700 flight control
system. It connects directly into the flight control system via cables, chains, push rods, or other
means and transmits the power from the motor in the servo actuator to the flight controls,
when engaged. The GSM 85A is a mechanical appliance with no software of electronic
hardware.
2.12 GTP 59 OAT PROBE
Figure 2‐13. GTP 59 OAT Probe
The GTP 59 OAT Probe provides outside air temperature measurements which are used by the
GDC 74A. The GTP 59 communicates to the system through the GDC 74A/B.
2.13 GCU 478 REMOTE CONTROLLER
Figure 2‐14. GCU 478 Control Unit
The GCU 478 provides certain redundant control features and is the control for HDG, CRS, and
ALT SEL.
Page 2-8 Cirrus Perspective™ Line Maintenance Manual
Rev. E 190-00920-00