Section 2 System Overview
1
st
Ed Nov 2018
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
2-37
Table 2-11: Advisory Alerts
Visual 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
Chime
Indicates mismatch of altimeter
settings or altimeter modes between
systems. 10-second time delay.
[2] [3]
Chime
TAS audible inhibited through
activation of TCAS/TAS audio inhibit
input. **
Chime
TAWS glideslope cancel (GPWS
Mode 5) activated through use of
discrete input. Enhanced HTAWS
only. **
Chime
TAWS inhibited through discrete
input. **
Chime
TAWS low altitude mode activated
through use of discrete input. **
Chime
Only active with TCAS-II. Indicates
system is either in standby or
executing functional test in flight.**
Chime
Only active with TCAS-II. Indicates
system is unable to display resolution
advisories. **
Chime
Only active with TCAS-II. Indicates
system is in functional test on
ground. **
Chime
Only active with good inter-system
communications and crossfill not
inhibited. Indicates systems are not
synchronized and synchronized
function is available. **
[2] [3]
Chime
Only with good inter-system
communications, indicates crossfill is
inhibited through discrete input.**
[2] [3]
2.5.6 Side-Specific Advisory Alerts
Side-specific advisory alerts have the same characteristics as advisory
alerts except, they always appear in the lower-left corner of the transmit
enabled IDU screen.
