I noticed the following behaviour: when there is already a speed in the speed display when engaging LVL CHG, the speed display will change to the current speed. I don't think this is right, according to my manuals:- if a speed mode is not active, existing speed becomes target speed.- if a speed mode IS active, this speed is retained as target speed.The behaviour I described can easily be recreated by handflying the aircraft while the FD is in V/S and the A/T is in MCP SPD. If you don't fly this accurately there will be a difference between the speed bug setting and the actual speed. Change to LVL CHG and the speed bug will change to the current speed, which I think it shouldn't. Now I realize this is a silly example but I noticed it in other circumstances as well.Leo Bakker

Hi Leo,I agree, I have had this happen to me also. I'm glad you had the real manuals to clear this matter up.Regards,Glenn Harrall

I see the same thing in the Continental 737 flight manual.Lee Hetherington (KBED)