Figure 2-5 Gmu 11 Magnetometer; Figure 2-6 Gmu 44B Magnetometer; Figure 2-7 Gtp 59 Outside Air Temperature Probe; Gmu 11 Magnetometer - Garmin GI 275 Maintenance Manual

2.4.4

GMU 11 Magnetometer

The GMU 11 Magnetometer senses the magnetic field and sends the data to the internal ADAHRS to
determine aircraft magnetic heading. This unit receives power directly from the GI 275 and communicates
with the AHRS board via RS-232. The GMU 11 is applicable to Class I & II aircraft only.
2.4.5

GMU 44B Magnetometer

The GMU 44B Magnetometer senses the magnetic field and sends the data to the internal ADAHRS to
determine aircraft magnetic heading. This unit receives power directly from the GI 275 and communicates
with the AHRS via RS-485 and RS-232.
2.4.6

GTP 59 OAT Probe

The GTP 59 is a remotely mounted temperature probe that interfaces to the internal ADC for OAT display
and true airspeed computations. The GTP 59 is mounted externally on the aircraft and is powered from the
GI 275.

Figure 2-7 GTP 59 Outside Air Temperature Probe

190-02246-11
Rev. 1

Figure 2-5 GMU 11 Magnetometer

Figure 2-6 GMU 44B Magnetometer

GI 275 Part 23 AML STC Maintenance Manual
Page 2-9