Garmin G1000 Manual De Usuario

190-00498-07  Rev. A

2

• GDU 1040/1044B – The GDU 1044B features a 10.4-inch LCD display with 1024 x 768 resolution.  The left 

display is configured as a PFD and the right display is configured as an MFD.  Both GDU 1044Bs link and 
display all functions of the G1000 system during flight.  The displays communicate with each other through a 
High-Speed Data Bus (HSDB) Ethernet connection.  Each display is also paired via an Ethernet connection with 
a GIA 63 or 63W Integrated Avionics Unit.  Systems that do not use the GFC 700 Automatic Flight Control 
System use the GDU 1040, which employs the same features as the GDU 1044B without the controls for the 
Garmin GFC 700 Automatic Flight Control System (AFCS).

• GIA 63/63W (2) – Functions as the main communication hub, linking all LRUs with the PFD.  Each 

GIA 63/63W contains a GPS receiver, VHF COM/NAV/GS receivers, a flight director (FD) and system integration 
microprocessors.  The GIA 63W contains a GPS SBAS receiver.  Each GIA is paired with a respective GDU 
1040/1044B display through Ethernet.  The GIAs are not paired together and do not communicate with each 
other directly.

• GDC 74A (1) – Processes data from the pitot/static system as well as the OAT probe.  This unit provides 

pressure altitude, airspeed, vertical speed and OAT information to the G1000 system, and it communicates with 
the GIA 63/63W, GDU 1040/1044B, and GRS 77, using an ARINC 429 digital interface.  The GDC 74A  also 
interfaces directly with the GTP 59.