Garmin Display Unit GDU 1040

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                       The GDU 1040 has a 10.4 inch LCD display with 1024x768 resolution. 
              The cockpit has two GDU 1040s.One is configured as a Primary Flight Display (PFD) and the other is configured as the Multi-Function Display (MFD). The MFD shows navigation, engine, and airframe information. The PFD shows primary flight information, in place of gyro systems. Both GDU 1040s connect and show all functions of the G1000 system during flight. The displays communicate with each other and the GIA 63 Integrated Avionics Units (IAU) through a High-Speed Data Bus (HSDB) Ethernet connection. The PFD and MFD have a reversionary switch in which one display can show all information usually shown by both displays in the event that one does not operate correctly.
MAINTENANCE PRACTICES
CAUTION:  If possible, do not touch the lens. The GDU 1040 lens has a layer of anti-reflective material which is very sensitive to skin oils, waxes and abrasive cleaners.
CAUTION:  Do not use cleaners that contain ammonia. Ammonia will cause damage to the
anti-reflective material. It is very important to clean the lens with a clean, lint-free cloth and an eyeglass lens cleaner that is specified as safe for anti-reflective material.
A.  Remove the Garmin Display Unit (GDU)
(1)  Disengage the applicable Primary Function Display (PFD) or Multi-Function Display (MFD) circuit breaker for the GDU.
(2)  Turn the quick release fasteners 1/4 turn counterclockwise with a 3/32" hex drive tool. (3)  Carefully pull the GDU from the instrument panel.
(4)  Disconnect the electrical connector from the GDU.
B.  Install the Garmin Display Unit (GDU)
CAUTION:  If possible, do not touch the lens. The GDU 1040 lens has a layer of anti-reflective material which is very sensitive to skin oils, waxes and abrasive cleaners.
CAUTION:  Do not use cleaners that contain ammonia. Ammonia will cause damage to the
anti-reflective material. It is very important to clean the lens with a clean, lint-free cloth and an eyeglass lens cleaner that is specified as safe for anti-reflective material.
NOTE:  If a new unit is installed, it is necessary to load the software and configuration.
NOTE:  If the initial unit is installed in the initial location or in the opposite location, it is not necessary to load the software and configuration.
(1)  Make sure the connector and connector pins have no damage.                                                    
(a)  Replace the connector or connector pins if applicable.
(2)  Connect the electrical connector to the GDU.
(3)  Put the GDU in position flush with the instrument panel.
(4)  Make sure the locking-stud alignment marks are in the vertical position.
NOTE:  Light forward pressure can be required to engage the quick release fasteners.   Turn the quick release fasteners 1/4 turn clockwise with a 3/32" hex drive tool.
(6)  Make sure the GDU operates correctly.
(a)  If a new unit is installed, load the software and configuration. 
(b)  Do a check to make sure the GDU operates correctly. 



















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