View Single Post
Old 18th Mar 2018, 00:51
  #1 (permalink)  
Banana Joe
Join Date: Jan 2018
Location: Amantido
Posts: 854

Going through my first type rating and I am a bit confused on the difference between VNAV PTH and VNAV SPD. Am I correct in saying that:
  • in VNAV PTH the FMC will command pitch to mantain pitch and if required it will command the autothrottle to mantain FMC SPEED
  • in VNAV SPD the FMC will retard the throttle levers to IDLE and mantain speed with pitch and will not attempt to stay on path similar to LVL CH
I do understand that the ideal descent path, provided forecast winds are correct, will result in a idle descent.
Banana Joe is offline