EGT indication problems CFM56-7 engines. 737-6/7/8/900

As some of you know, the -7 engine has some EGT indication reliability issues. This is a known problem at the engine manufacturer, and they are working on a solution. During troubleshooting iaw FIM not all problems are found always.
If a fault message is found, check this message with previous occurences. Current solutions for the indication problems are:
Cleaning of the plugs (temp solution), and replacing the EGT harness.

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