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Enstrom TH-28/480 Series Maintenance Manual Supplement 8
G1000H Integrated Flight Deck System
Rev. 1, Jan 25/18
Page
1-29
GDU 1040H MFD/PFD (Figure 18)
1.5.1.1 Scheduled
Maintenance
There is no scheduled maintenance for the GDU 1040H. Maintenance is “On Condition
Only”.
1.5.1.2 Removal
A. Remove power to the GDU 1040H. Pull the PFD and/or MFD circuit breakers out
(emergency circuit breaker panel also). Disable the circuit breaker by installing a
cable tie or other similar device around the circuit breaker stem.
B. Remove each of the four captive screws from the front of the display using a 3/32”
hex drive tool.
C. Gently pull the display out of the panel. Hold unit tightly to prevent dropping it. The
display is only about 2-3 inches thick.
D. Remove the connector from the back of the unit by loosening the hardware on the
backshell.
E. Remove and save any SD cards to install in the replacement display.
1.5.1.3 Installation
A. Inspect wire harness connector for damaged pins before installing the unit.
B. Attach the backshell to the unit and tighten hardware.
C. Hold the GDU flush with the instrument panel and ensure that the captive screws
on the GDU align with the hardware on the instrument panel.
D. Turn each of the four captive screws clockwise using a 3/32” hex drive tool (not
exceeding 20 +/-2 in-lb).
E. Remove the cable tie or other similar device from the PFD and/or MFD circuit
breaker stem and push the stem in to set the circuit breaker.
F. Perform the GDU testing procedure in accordance with Section 6 of the G1000H
Integrated Avionics System Standard Maintenance Manual.
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