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Old 22nd Dec 2013, 02:09
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rsbessa
 
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Question 737NG VNAV PATH QUESTION (new S/N)
Hi everyone...

I'm flying for an operator with a "large" 737NG fleet and I've noticed something different on newest acfts.

During descent (VNAV PATH), when updating an active waypoint, sometimes the path goes all the way down (nothing new here), right ?

Older models used to do the energy compensation in order to loose altitude and chase the path. The newest ones are automatically changing the pitch mode to VNAV SPD, reducing the speed for the planned descent speed (269kts in our case) and removing the PATH option from the CDU's DES page.

I've searched the FCOM over and over but couldn't find any information about this "new behavior".

Does anyone knows why this happens with those new acfts (and where is this information ?)

Thanks in advance...
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