Installation Manual

Lynx NGT-9000
Installation Manual
0040-17001-01 (Revision W) Maintenance Page 4-19
Table 4-2: System Status Messages
SYMPTOM CAUSE/CORRECTIVE ACTIONS
TAWS – Fail *
Or
Terrain Fail *
The message is seen due to the following failure(s):
• GPS Fail
• Terrain (71DC) or Airport (68DC) 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.
TAWS Unavailable
Or
Terrain Unavailable
The message is seen when the GPS quality is not great enough
for TAWS/Terrain to operate or by flying into an area outside of
the terrain database (71DC) coverage.
1. The message is removed after the conditions listed above
causing the issue are resolved.
Transponder – External Fail The message is seen due to the following failure(s):
• 1090 Invalid Mode S Address
• Altimeter – Gillham Altitude Input
• Altimeter – RS-232 Input
• Altimeter – ARINC 429 Input
1. Try clearing the failure performing a warm startup by
tapping the Restart button.
2. Check that the equipment listed above is operational.
3. If the problem continues, replacement or the listed input
device may be required. Contact ACSS Field Service
before removal.
Transponder – Fail * The message is seen due to the following failure(s):
• 1090 Transmission
• 1030 Transponder Receiver
1. Try clearing the failure performing a warm startup by
tapping the Restart button.
2. An invalid Mode S Address fault may indicate that the
address was not properly entered during configuration
setup. Refer to the Installation checkout for details.
3. If the problem continues, replacement of the unit may be
required. Contact ACSS Field Service before removal.
Unit Over Temp Service Soon Internal over temperature condition detected.
1. Make sure the ventilation holes are clear to permit
sufficient airflow for cooling.
2. If the problem continues, replacement of the unit may be
required. Contact ACSS Field Service before removal.
* Note: There are internal hardware failures that could occur, which will cause all of the system functions
to indicate failure.