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Section 2 System Overview
2-28
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
1
st
Ed Nov 2018
Table 2-8: Caution Alerts
Visual Alert
Voice Alert/
Alert Tone
Condition
** No time delay
[1]
Only active in dual-sensor installation with neither sensor in failure condition
[2]
Only active in dual-system (pilot and co-pilot)
[3]
Only active when single-pilot mode discrete not asserted
Alert Tone
Enabled by ADS-B out fail warning
limits setting. Mode-S transponder
indicates bad ADS-B out status.
Also, set by audio/radio interface with
NGT-9000R transponder.
2-second time delay.
Alert Tone
Indicates no valid bank, pitch, nor
heading received from enumerated
AHRS(s) for more than 1 second.
Inhibited during and for 10 seconds
after unusual attitude mode.**
[1]
“Auxiliary
Sensor Failure,
Auxiliary
Sensor
Failure”
No valid message or bad status
received from installed optional
sensors. Sensor status displayed in
faults menu.
5-second time delay. Inhibited during
and for 10 seconds after unusual
attitude mode. Applies to the
following optional sensors:
RS-232
TAS
ADS-B
system
WX-500 Lightning system
Analog interface system
Alert Tone
IDU core temperature greater than
95°C. 2-second time delay.