Tecnam P2002 JF - ATA 34-30 GNS 430 W;530 W Troubleshooting

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nd
Edition – Rev 0
34-20
POSITION DETERMINING – TROUBLESHOOTING
TROUBLESHOOTING
Following table provides information to assist troubleshooting if problems occur on GNS
430W/530W unit.
The applicable CMM contains other troubleshooting and testing procedures dedicated to the
applicable unit and based on the fault messages displayed.
ATA 34-30 GNS 430W/530W Troubleshooting
Trouble
Likely cause
Action required
The unit does not power on.
The unit is not getting power
to the main connector.
Make sure power is
connected to the main
connector
Check circuit breakers and
avionics switch.
The unit does not receive
signals.
Antenna disconnected
Check antenna connection
Antenna wiring defective
Test wiring
Unit defective
Replace/overhaul unit