G900X/G950 Installation and Maintenance Manual – Troubleshooting
Page D-9
190-00719-00
Revision D
D.3 System Status Page (MFD Normal Mode)
Figure D-2. Example System Status Page
The AUX – SYSTEM STATUS page on the MFD displays LRU health status in normal mode.
Failed Path Messages
The following message indicates that a data path connected to the GDU (PFD1 or MFD) or the
GIA 63W (1 or 2) has failed.
•
FAILED PATH – A data path has failed.
The
FAILED PATH
message is triggered by a timeout of any one digital channel. The channels that are
checked are listed on these pages in config mode:
1)
GDU RS-232 / ARINC 429 CONFIG (PFD1 and MFD)
2)
GIA RS-232 / ARINC 429 CONFIG (GIA1 and GIA2)
3)
GIA CAN / RS-485 CONFIGURATION (GIA1 and GIA2)
Once the FAILED PATH message has been triggered, it remains on the list of messages until the next
power cycle. This latching was implemented so that for intermittent failures, the message would remain
at the end of the flight (to alert the maintenance crew). This also keeps the crew from having to
repeatedly acknowledge messages in the case of intermittent failures.
The box next to each channel indicates the current status of the channel as indicated below:
•
Red = data path is known to be failed
•
Black = data path status is unknown
•
Green = data path is known to be good
