89000109-002
xVue Touch Installation Manual
Rev 2
Page 8-12
© Honeywell International Inc. Do not copy without express permission of Honeywell.
For Use in Non-Certified Aircraft
8.3 KG 71EXP Troubleshooting
Table 8-4 KG 71EXP Installation Troubleshooting
System Behavior
Possible Root Cause
Troubleshooting Action
After power up, the KG 71EXP system
does not provide any valid data – all
attitude as well as air data remains
invalid at the PFD.
When CMT is connected and power is
applied, the connection between the
KG 71EXP and the CMT is not
established.
The KG 71EXP does not power up when electrical power is
applied.
• Check the KG 71EXP circuit breaker.
• Check the KG 71EXP power wiring including the KG 71EXP
connector.
• If power installation is correct, restart the KG 71EXP. If prob-
lem persists, replace the KG 71EXP unit.
RAM Integrity Check fails
• Restart the KG 71EXP. If
problem persists, replace
the KG 71EXP unit.
Application SW Integrity
check fails
• Restart the KG 71EXP. If
problem persists, replace
the KG 71EXP unit.
*Note that because the CMT Application SW cannot communicate with the KG 71EXP, there is no event
logged.
After power up, the KG 71EXP system
does not provide any valid data – all
attitude as well as air data remains
invalid at the PFD.
When CMT is connected and power is
applied, the connection between the
KG 71EXP and the CMT is correctly
established.
HW Watch Dog PBIT Check
(Part 1 or Part 2) fails.
• Restart the KG 71EXP. If
problem persists, replace
the KG 71 unit.
Software Part Number Check
fails.
• Replace the KG 71EXP unit.
Note: If in-field SW updates
will be allowed, then the KG
71EXP SW should be re-
loaded first.
NVM Application Data
Integrity Check fails.
• Connect CMT and re-config-
ure the KG 71EXP system. If
problem persists, replace
the KG 71EXP unit.
After power up, the KG 71EXP provides
all attitude and heading data but no air
data except the Indicated Airspeed.
Static IPT Sensor Check fails.
Event Log Code 5.
• Restart the KG 71EXP. If
problem persists, replace
the KG 71EXP unit.
After power up, the KG 71EXP provides
Altitude only, no airspeed.
Differential IPT sensor Check
fails. Event Log Code 5.
• Restart the KG 71EXP. If
problem persists, replace
the KG 71EXP unit.
