Section 5 Menu Functions and Procedures
Rev A Apr 2019
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
5-49
5.20. MFD Fault Display (FAULTS) Menu
FAULTS..
GPS PWR
OK
GPS EQPMNT
OK
GPS SATLT
OK
GPS FDE
OK
GPS LOI
OK
GPS HPL
0.1NM
SBAS MSG
OK
SBAS HLTH
OK
WX-500
OK(a)
TRFC
OK(b)
AIU
OK(c)
ADSB POSN
OK(d)
ADSB MAINT
OK(d)
ADSB CSA
OK(d)
GPS/SBAS loss of navigation:
absence of power
GPS/SBAS loss of navigation:
probable equipment failure
GPS/SBAS loss of navigation:
inadequate satellites
GPS/SBAS loss of navigation:
Unable to exclude position failure
GPS/SBAS loss of integrity
GPS/SBAS horizontal protection
level in nautical miles
GPS/SBAS loss of navigation:
no valid SBAS message
GPS/SBAS loss of navigation:
insufficient healthy satellites
WX-500:
loss of communication
Traffic sensor:
loss of communication
Analog interface:
loss of communication
ADS-B datalink:
position validity
ADS-B datalink: receiver
maintenance required
ADS-B datalink: Conflict
Situational Awareness working
(a) Shown if optional WX-500 installed
(b) Shown if optional traffic sensor installed
(c) Shown if optional AIU installed
(d) Shown if optional ADS-B datalink installed
GPS VPL
25M
GPS HFOM
0.0NM
GPS VFOM
19M
GPS ALMANAC OK
GPS/SBAS vertical protection
level in meters
GPS/SBAS vertical figure of merit
(95% accuracy) in meters
GPS/SBAS horizontal figure of
merit (95% accuracy) in nautical
miles
GPS/SBAS almanac validity
MENU
Figure 5-22: MFD Fault Display Menu
Upon selecting the MFD faults menu, the status of the following system
parameters are displayed:
1) GPS/SBAS loss of navigation due to absence of power (GPS PWR)
2) GPS/SBAS loss of navigation due to probable equipment failure (GPS
EQPMNT)
3) GPS/SBAS loss of navigation due to inadequate satellites to compute
a position solution (GPS SATLT)
4) GPS/SBAS loss of navigation due to a position failure that cannot be
excluded within the time to alert (GPS FDE)
5) GPS/SBAS loss of integrity and loss of navigation due to loss of
integrity (GPS LOI)
6) Readout of the current GPS/SBAS horizontal protection level (GPS
HPL) in nautical miles. This value may be used as the estimate of
position uncertainty required in RNP airspace.