190-01115-01
G3X/G3X Touch Install Manual - GDU 4XX Config and Post Install Checkout
Rev. AC
Page 34-166
34.4.26.27 Annunciator Outputs
The GEA 24 and GSU 73 have two discrete output pins, which can be used to drive external indicator
lamps. These outputs are optional and do not require any configuration.
DISCRETE OUT 1 acts as a Master Warning annunciator, and is active (pulled low) any time a warning-
level (red) alert is displayed on the PFD.
DISCRETE OUT 2 acts as a Master Caution annunciator, and is active (pulled low) any time a caution-
level (yellow) alert is displayed on the PFD.
See
and
for guidance on wiring indicator lamps to the annunciator output pins.
If two EIS LRUs are configured, connect indicator lamps to EIS LRU #1 only.
34.4.26.28 Lean Assist
Lean Assist is a feature that monitors and detects peak temperatures for EGT or TIT as the pilot leans the
engine's air/fuel mixture. When configuring EGT or TIT inputs, Lean Assist can be enabled or disabled. If
Lean Assist is enabled, the LEAN softkey will appear on the ENG page in normal mode. Lean Assist
should be disabled for engines that do not have pilot-controllable air/fuel mixture, including FADEC
engines.
34.4.26.29 Engine Power
Estimated engine power can be calculated for Lycoming and Continental engines, using inputs from RPM,
manifold pressure, and fuel flow sensors (all three are required for engine power calculation).
On the Engine Power Configuration page, select the appropriate engine type (Lycoming or Continental,
turbocharged or normally-aspirated). Then enter the engine's maximum rated power and RPM (for
example, 180 horsepower at 2750 RPM).
For a turbocharged engine, enter the manifold pressure for maximum rated power. Configuring maximum
manifold pressure is not required for a normally-aspirated engine, as it is assumed to produce maximum
power at sea level pressure.
To display engine power data or related status information from a FADEC engine, select "FADEC" for the
engine type. Not all FADEC types provide engine power information; some other FADEC types provide
general power status (for example, an Economy mode indication) but not a percentage.
