Installation Manual

Table Of Contents
Lynx NGT-9000
Installation Manual
0040-17001-01 (Revision W) Maintenance Page 4-18
Table 4-2: System Status Messages
SYMPTOM CAUSE/CORRECTIVE ACTIONS
TASExternal Fail
TCASExternal Fail
The message is seen due to the following failure(s):
Altimeter Gillham Altitude Input
Altimeter RS-232 Input
Altimeter ARINC 429 Input
ARINC 429 AHRS Input
1. Try clearing the failure performing a warm startup by
tapping the Restart button.
2. If the problem continues, check the directional antenna or
cables for possible errors.
3. Message is seen when aircraft is on ground and audio is
muted.
4. If the problem continues, replacement of the directional
antenna may be required. Contact ACSS Field Service
before removal.
TAS - Fail *
TCAS - Fail *
The message is seen due to the following failure(s):
1090 ADS-B In Receiver
1030 Transmission
1030 Transponder Receiver
TAS/TCAS 1030 Transmission
TAS/TCAS 1090 Receiver
1. Try clearing the failure performing a warm startup by
tapping the Restart button.
2. Try clearing the failure by calibrating the directional
antenna per section 3.8.3.
3. If the problem continues, replacement of the unit may be
required. Contact ACSS Field Service before removal.
TAWS - Degraded
or
Terrain Degraded
The message is caused by an internal issue with the software.
1. Try clearing the failure performing a warm startup by
tapping the Restart button or cycle power to the unit.
2. If the problem continues, replacement of the unit may be
required. Contact ACSS Field Service before removal.
TAWS - External Fail
Or
Terrain External Fail
The message is seen due to the following failure(s):
GPS Antenna/Cable
Audio Mute Failure
1. Try clearing the failure performing a warm startup by
tapping the Restart button.
2. If the problem continues, check the GPS antenna (short),
cables, or Audio Mute wiring/switch for possible errors.
3. Message is seen when aircraft is on ground and audio is
muted.
4. If the problem continues, replacement of the GPS
antenna may be required. Contact ACSS Field Service
before removal.