I do not know how system should work, trying to watch some YT movies but cannot figure out.
My procedure is that during taxi i engage L&V NAV modes, FD and AT is on, then i press TO/GA and choose '1' for derated take off. During take off advance throttle until derated thrust marker position and press THR. After lift off engage AP, aprox 1500 AGL. Thrust mode remains same as for take off, then i have to press CLB mode. Having experience from other Boeing planes done by another company i know that take off power automatically changes into climb power as u reach 1500ft AGL, so my question is if 767 is different or is it a bug?
Next flight i will test ur way of engaging VNAV after passing 1500 ft AGL.