SUPPLEMENT SG-3
CHAPTER 31 - INDICATIONG SYSTEM
VISUAL HARDWARE INSPECTION
Begin troubleshooting with a visual inspection. Check for corro-
sion, 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 4 for LRU replacement. Refer to the OEM mainte-
nance documentation for instructions on removing any aircraft
access panels.
LRU FAILURE ANNUNCIATIONS
A red X through a display field indicates that a particular display field is not receiving
valid data. Figure below shows typical display fields and their associated LRU's that are
not receiving valid data.
LRU Failure Annunciations
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