Garmin G1000 Line Maintenance Manual page 5

Uncontrolled if Printed
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CAUTION
The GIA contains a lithium battery that must be recycled or disposed by
professional services according to applicable governing laws.
NOTE
This document might contain information which is subject to the Export
Administration Regulations ("EAR") issued by the United States Depart-
ment of Commerce (15 CFR, Chapter VII Subchapter C) and which may
not be exported, released or disclosed to foreign nationals inside or outside
the United States without first obtaining an export license. The preceding
statement is required to be included on any and all reproductions in whole
or in part of this manual.
NOTE
A single event upset (SEU) is an uncommanded change in state of the
memory inside of an LRU. SEUs are normally caused by physical interac-
tions between cosmic rays (high energy particles originating from outside
of our atmosphere) and device memory. SEU occurrences are more com-
mon at high altitudes due to the proximity to where the cosmic rays origi-
nate. The change in memory state observed during an SEU can impact
software program flow and/or it can change parameter values being pro-
cessed.
NOTE
To protect against any SEUs, many Garmin LRUs incorporate hardware
with Error Checking and Correcting (ECC) functionality. This hardware can
detect an SEU and repair the changed memory state caused by the SEU.
When SEUs are corrected in this manner, their occurrence does not inter-
fere with operation of the equipment and typically goes unnoticed by the
crew. In some rare cases however, an SEU might cause more errors than
can be corrected by the ECC functionality. In this case, the LRU must be
restarted to correct the error and a temporary disruption in LRU functional-
ity might be seen. This restart will be performed automatically by the LRU.
There is no maintenance action required as a result of such an SEU-driven
restart, and the LRU is capable of resuming normal operation after the cor-
rective restart.
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LMM for the Kodiak 100 LMM
190-02102-00 Rev.4
Page iii