R Mod : 5021 or 5022
ATR 42 Model : 400/500
GPS
NAVIGATION SYSTEM
GLOBAL POSITIONING SYSTEM
P 9
NOV 00
120
1.15
.
60
60.3 ELECTRICAL SUPPLY/SYSTEM MONITORING
ELECTRICAL SUPPLY
EQUIPMENT
DC BUS SUPPLY
GPS
DC BUS 2
(on overhead panel GPS)
SYSTEM MONITORING
The following conditions are monitored by visual alert :
- The number and/or the geometry of the received satellites are not sufficient for the
RAIM to assure the positioning reliability.*
- One of the received and used satellites is not valid. The position is erroneous.**
- If a local message or a system failure are detected.
There are no priority of displayed message for RAIM function.
D
RNV MSG illuminates amber on EADI.
D
DGR illuminates amber on EHSI.
The crew can find the right origin of the alert by viewing the MESSAGE page of the
GPS.
* In that case the crew may consider GPS information but must crosscheck with
usual means of navigation.
** In that case the crew has to use only usual means of navigation.
AA
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