With the FMC programmed with route, star, and approach, I notice it is unable to slow down to the required 250KTS at 10,000 feet on descent. Am I supposed to intervene and provide a little speed brake to help out?Another question: when using VNAV and LNAV, does the autothrottle switch need to be on, or can the FMC access the throttles by itself?Yet another question: do I need to hit the "approach" button in order to fly the ILS, or can the FMC fly it by itself (if the ILS approach is programmed at the end of the route)?Thanks in advance.

>With the FMC programmed with route, star, and approach, I >notice it is unable to slow down to the required 250KTS at >10,000 feet on descent. Am I supposed to intervene and >provide a little speed brake to help out? Yes, you may need to help it out at times. I think it was acknowledged some time ago that the 767 PIC FMC doesn't handle the vertical speed constraints too well. You can either help it out with a little speed brake, use speed intervention (by opening the speed window and dialing in 250 knots a little early), or set up an along path waypoint with a 250 knot speed restriction a little before you get to 10,000 feet (a little more difficult if you don't already know at what point along the path you will be at 10,000 ft).>Another question: when using VNAV and LNAV, does the >autothrottle switch need to be on, or can the FMC access the >throttles by itself? The autothrottle needs to be on.>>Yet another question: do I need to hit the "approach" >button in order to fly the ILS, or can the FMC fly it by >itself (if the ILS approach is programmed at the end of the >route)? >The FMC can set you up for the approach, and programmed accurately, may be able to do a pretty good job flying the approach, but if you want to fly the ILS, you need to hit the "approach" button.Don S.