Installation Manual

Lynx NGT-9000
Installation Manual
0040-17001-01 (Revision W) Maintenance Page 4-15
Table 4-2: System Status Messages
SYMPTOM CAUSE/CORRECTIVE ACTIONS
Config Module Service soon
Configuration module is not attached, signal is intermittent, or
the data on Configuration Module failed has failed.
1. Use the MPC (MAT)
(via the MPC) to retrieve configuration
data and verify that the Configuration Module is attached
and working correctly.
2. Use the MPC (MAT) (via the MPC) to save configuration
data to DCM.
3. If the problem continues, replacement of the DCM or unit
may be required. Contact ACSS Field Service before
removal.
Cross Check Heading
The message is seen when the GPS ground track is 60
degrees different from the external heading input.
1. Try clearing the failure performing a warm startup by
tapping the Restart button or cycling power to the unit.
2. Check heading source for errors.
3. If in ground test mode, ensure that the “Simulated Own
Direction” field is set to the current actual heading, where
the Simulated Own Direction is entered as the ground
track.
4. If the problem continues, contact ACSS Field Service.
FIS-B - Fail *
The message is seen if the following test fails or signal is lost:
• L-Band (UAT/1090) Antenna
• UAT Module Failure
1. Try clearing the failure performing a warm startup by
tapping the Restart button.
2. Check the L-Band antenna or cables for possible errors.
3. If the problem continues, replacement of the L-Band
antenna or the unit may be required. Contact ACSS Field
Service before removal.
FIS-B Degraded
Airport or Map Database compatibility failure.
1. Try clearing the failure performing a warm startup by
tapping the Restart button or cycling power to the unit.
2. Reload the Databases using the MPC (MAT).
3. If the problem continues, contact ACSS Field Service.
GPS – Acquiring
The message is seen if the GPS is searching for a signal:
1. Move the aircraft in an area that does not block the GPS
signal.
2. Wait for signal to connect. New installations can take
longer than normal operation.
3. Try clearing the failure performing a warm startup by
tapping the Restart button.
4. If the problem continues, check the GPS Antenna or
cable for problems. Replacement of the GPS antenna or
unit may be required. Contact ACSS Field Service before
removal.