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Common VNAV Option B737

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Common VNAV Option B737

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Old 9th Mar 2009, 00:37
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Common VNAV Option B737

Can anyone explain what the difference and benefits, if any, of having the common VNAV option selected when operating with 10.7 on a B737 400.

Cheers Mangatete
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Old 9th Mar 2009, 09:48
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and... Can anyone explain what the "common VNAV option" is?
[yes, i know what VNAV is - but "common"...?!]
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Old 10th Mar 2009, 06:54
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Red face

I cannot find to much about it in the Boeing Vol 2, but have operated both with and without the common VNAV option selected. With the COMMON VNAV OPTION incorporated the pilot cannot select a speed descent, however the FMC will automatically change to a speed descent when descending in a path descent and the aircraft is above the path. It will automatically revert back to a path descent when on or below the descent path.
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