Engine Rating MCP?

Hi there,

today i got the following engine Rating by chance, without having moved the throttles at all.

left engine suddenly became Mode MCP instead of MCR 74%
right engine remained Mode MCR 80%

I was unable to adjust both engines percentage (%) to get the same figure again.

Just at the beginning of that strange behaviour there came a message " TRQ Uptrim" on the engine display. What does that mean?


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