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Page 2-2 G1000 System Maintenance Manual – Diamond DA40/40F
Revision G 190-00545-01
2.2 Equipment Descriptions
2.2.1 GDU 1040 PFD & GDU 1040, 1042, or 1044 MFD
Two Garmin GDU 1040 displays are installed in the Diamond instrument panel. One is configured as a
PFD and the other as a MFD (Configuration is determined by wiring harness). Both displays provide
control and display of nearly all functions of the G1000 integrated cockpit system. The displays are
located side-by-side with the GMA 1347 Audio Panel located in the middle. For GFC 700-equipped
aircraft, the MFD is either a GDU 1042 or GDU 1044. Both are distinguished by their dedicated AFCS
control keypad on the lower left bezel. The GDU 1044 has an additional VNV key which allows for
coupled-VNAV descents.
Electrical power to the PFD is from the ‘Essential’ power bus, whereas the MFD receives power from the
‘Main’ power bus. Therefore, both displays power-up immediately when the aircraft master switch is
turned on. To provide proper electrical bonding, beryllium copper ‘finger’ strips are installed on the
lower lip of the display. This provides sufficient contact area to which the displays can be grounded to
the airframe.
Both displays are installed in the Diamond panel using built-in ¼-turn fasteners. Each display uses an
existing connector per OAM 40-161 or OAM 40-226.
Two cooling fans are also installed behind the panel for PFD and MFD cooling.
For MDL configurations -1,-3 and -5 only, this STC installation approves alternate part numbers for the
displays that accept external video input and have an additional HSDB Ethernet connection. There are no
mechanical or electrical interface changes needed for these new part number displays. Refer to the
applicable General Arrangement Drawing listed in Table 1-2 for part number information.
NOTE
While the alternate part numbers of displays authorized by this STC include an external
video input and HDSB Ethernet connection, this STC does not approve any interfaces to
these ports. These ports are not configured on by this STC. Any interfaces to these ports
will require activation of these ports and additional airworthiness approvals will be
required.
2.2.2 GMA 1347 Audio Panel
The Garmin GMA 1347 Audio Panel is a digital audio panel with integrated marker beacon receiver. The
GMA 1347 provides control of all cockpit intercom/mic systems as well as NAV/COM/ILS audio. The
unit also provides display reversion mode control through a large red button. Power is received from the
‘Essential’ bus. The unit powers up when the aircraft master switch is turned on. The GMA 1347
interfaces with the existing marker beacon antenna as well as existing mic and phone jacks.
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