Dual Tachometer; Alternate Engine Data Source Annunciations - Garmin G1000H Pilot's Manual

ENGINE INDICATION & CREW ALERTING SYSTEM
TAKEOFF TIMER
After the engine has been started, if Q or MGT are within the takeoff limitation ranges, the G1000H displays
a 5-minute countdown timer inside the PSI gauge. The timer flashes beginning when 30 seconds remain until
an exceedance will occur; the timer is automatically removed when either Q or MGT fall below takeoff limits.

DUAL TACHOMETER

The dual tachometer displays rotor speed (NR) and power turbine speed (NP) as percentages. A readout
for NR is provided. The long pointer represents NR along the gauge scale; NP is shown with the short pointer.
Limitations are shown as colored arcs. A white tick mark represents the FADEC normal governing point. When
Quiet Mode is active, a magenta reference bug is shown the tachometer to indicate the Quiet Mode governing
point. The NR and NP pointers will be the same color as the arc(s) they are presently within.
During autorotation with an engine failure, the NP pointer will be displayed in gray and the dual tachometer
gauge scale will display power-off limitations.

ALTERNATE ENGINE DATA SOURCE ANNUNCIATIONS

If the G1000H is using alternate analog data sources to determine Q, MGT, NG, NP, or NR, a yellow 'ALTN'
annunciation box will appear to the right of the PSI gauge. In addition, a yellow subscript 'A' will be shown with
the affected parameter readout(s) (Figure 3-6).
In the event an alternate analog data source is unavailable or invalid, a white 'ALTN' annunciation box is
shown to the right of the PSI gauge A white subscript 'A' will be shown with affected the parameter readout(s)
(Figure 3-6).
If no valid data sources are available, a red 'X' is displayed instead of a readout, and any affected pointers will
be removed from the gauges.
86
Alternate Source
Data In-Use for
Torque
No Alternate
Data Source
Available for
Torque
Figure 3-6 Alternate Engine Data Source Annunciations
Garmin G1000H
™
Alternate Data Source In-
Use Annunciation
Alternate Data Source
Missing or Invalid
Pilot's Guide for the Bell 407GX 190-01255-00 Rev. A