PPRuNe Forums - View Single Post - VNAV reversion mode from PTH to SPD in late B737NG.
Thread: VNAV reversion mode from PTH to SPD in late B737NG.
View Single Post
Old 12th Jul 2013, 05:12
  #13 (permalink)  
framer
 
Join Date: Sep 2008
Location: 41S174E
Age: 57
Posts: 3,100
Received 495 Likes on 133 Posts
I think the above quote from the Boeing FCOM regarding limit speeds would govern
how higher about the path the plane must be to revert?
For example, if the aircraft was ten feet higher than the calculated vertical profile, it is unlikely that regaining it would exceed any limit speed and it would therefore remain in VNAV PTH. If however the aircraft was ten thousand feet higher than the calculated vertical path, then regaining the path would exceed VMO/MMO and VNAV SPD would result.
I stand to be corrected by folk more knowledgable than myself.
framer is offline  
Reply