Was 4500 level.
Mcp set at 4500.
So In VNAV ALT
Yes aware of and watched GS capture while in VNAV ALT.
Did not set lower alt did not hot the hit the button
Have asked a variety of sim ins, trainers and line pilots and opposing answers.
About 50% split. (some of these pilots 15- 25 years on type say it will descend)
i can only surmise that there is coding in FMC that is hidden to me that this will occur.
So no books or ifno on the triggers.
Found some research papers that talk around the six different descent trajectories and the 32 parameters it uses to fly the VNAV descent but have not really found hard rules as to what coding to look at or combinations of modes and speeds that trigger this.
Only been i 744 for 4 years but been boring holes in sky for 26 years now.