Garmin Diamond DA40, Maintenance Manual

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G1000/DA40 System Maintenance Manual Page 2-13
190-00303-03 Revision 6
2.5.2 GIA / AHRS Lightning Protection
The GRS 77 and both GIA 63s are uniquely protected from the effects of lightning. A 0.499 Ω resistor, a
transient voltage suppressor, and a 3.2 Amp slow-blow fuse are used for each GIA and the AHRS. These
components are installed on a field-fabricated aluminum block, which is mounted to the front of the
remote avionics enclosure (see Figure 2-7 and Figure 2-10). The dimensions for the mounting block are
provided in Figure 2-11. Power leads for the AHRS and both GIAs are routed from the aircraft harness to
a 9-pin connector (P900), whose mating connector is mounted to the fabricated block (J900). Figure 2-12
shows the wiring setup on the block for one set of components. Power is returned to the LRU after
passing through the resistor and voltage suppressor.
Figure 2-10. Lightning Protection Components
Figure 2-11. Component Plate Dimensions