BENDIXKing KSN 8 Series - Page 210

89000046-014 KSN 780/8XX/900 AeroNav AML STC Installation Manual for Helicopters
Rev 0 Page E-1
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Appendix E: Troubleshooting Guide
Component Trouble Probable Cause Solution
AeroNav XXX The unit is not getting power to
the main connector
The unit is not getting power. Check Circuit Breaker
Check wiring and unit seating in
tray
The AeroNav XXX is not
computing a position
Wiring Check Coaxial Cables
Antenna Verify antenna has a clear
unobstructed view of the sky
The GPS Signal levels are very
low
Wiring Check coaxial cable and
connectors
Check routing
Antenna shading Verify the antenna is mounted
on top of the aircraft
Verify antenna is clear of
hangars, buildings, etc.
Interference Verify another piece of aircraft
equipment is not interfering with
the GPS system
VHF Com is not transmitting
(Not Applicable for AeroNav
880/780)
Wiring Check the helicopter PTT switch
Check Audio Panel (if installed)
Check wiring
The AeroNav XXX is not tuning
the DME
(Not Applicable for AeroNav
880/780)
Configuration Verify the AeroNav XXX is
configured correctly.
Wiring Checking wiring
DME Verify the DME is configured for
the AeroNav XXX tuning type
RS-232 Device is not
communicating
Configuration Verify the AeroNav XXX is
configured for the appropriate
device.
Wiring Check wiring and unit seating in
tray
ARINC 429 is not communicating Configuration Verify the AeroNav XXX is
configured for the appropriate
device.
Wiring Check wiring and unit seating in
tray