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Section 2 System Overview
2-32
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
Track
: If groundspeed is greater than
30 kts, miscompare if difference is
more than 4°.
Groundspeed
: If difference between
GPS#1 and GPS#2 miscompare is
more than 10 kts.
10-second time delay. Inhibited
during and for 10 seconds after
unusual attitude mode.
[1]
Alert Tone
Indicates at least one glideslope is
receiving a signal within 1 dot of
center and difference between
glideslope signals is beyond limits
(0.25 dots). 10-second time delay.
[1]
Alert Tone
With neither AHRS failed nor in DG
mode. Indicates heading difference
between AHRS is beyond the
heading miscompare threshold limit.
60-second delay. Inhibited during
and for 10 seconds after unusual
attitude mode. Inhibit for 5 minutes
after startup.
[1]
Alert Tone
Indicates IAS difference between
ADCs is beyond limits.
10-second time delay. Inhibit for 5
minutes after startup.
[1]
Alert Tone
Indicates at least one localizer is
receiving a signal within 1 dot of
center and difference between
localizer signals is beyond limits
(0.25 dots). 10-second time delay.
[1]