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G1000 System Maintenance Manual
Page 5-1
190-00903-00
Rev.
A
SECTION 5
TROUBLESHOOTING
This section contains LRU troubleshooting methods and procedures which are designed to help
isolate a defective LRU. The procedures and methods do not pertain to any specific aircraft
configuration.
5.1 TROUBLESHOOTING
METHODS
5.1.1 Visual Hardware Inspection
Begin troubleshooting with a visual inspection. Check for corrosion, damage, or other defects.
Replace any damaged parts as required. Inspection may require the temporary removal of a unit
or units to gain access to connectors. Follow the guidance given in Section 6 for LRU
replacement. Refer to the OEM maintenance documentation for instructions on removing any
aircraft access panels.
5.1.2 LRU Failure Annunciations
When an LRU fails or is not receiving data, a large red ‘X’ is displayed in windows relating to
the failed LRU (Figure 5-1 and Table 5-1).
Figure 5-1. LRU Failure Annunciations
5.1.2.1 LRU Failure Annunciations and Recommended Actions
Table 5-1 lists specific annunciations, the associated LRU, and recommended actions to take.
Use the information listed in Table 5-1 in conjunction with Figure 5-1.
