In my company we do not turn EAI on in the descent until just before entering moisture (say 10-15 seconds before). Is this wrong? Should it be on for all the descent/hold if the only moisture anticipated is a layer of FZFG?
As an aside and please excuse the thread creep.... Found myself very high once in an A320 so decided to select full speed brake and disconnect the AP. Cabin crew rang from the the back galley thinking the tail was about to fall off; shan't try that again!