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Guest andre31

Alt Intv Button

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Guest andre31

Dear All,I'am a little bit confused about the alt intv button.On the 737-600 and 700, if I select an altitude on the MCP lowerthan the cruise altitude in the CDU Perf Page, this last oneis replaced by the selection on the MCP if I press the alt intv button.On the 737-800 and 900, whatever the altitude selected on the MCP,I press this button but it seems to no have no effect at all.But after reading the manual and some others articles, my understanding is that button permits to level off at a selectedaltitude without leaving the VNAV mode (that is the case on my 600 and 700) and also without changing the CDU Cruise Altitude (and it is not the case on my 600 and 700).Who can explain what really happens ? Do I have a problen withby aircraft (I precise all updated to the last version )?Why nothing happens on the 800 and 900 ? Thank a lotAndr

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