Since you still are on VNAV.....look in your CDU what kind of speed youhave, before and when reaching IAP fix. VNAV should take off speed, if you have it on that long.I would instead if VNAV, intervene my speed by pressing that button on MCP, so itwill override VNAV speed. But in most cases I prefer to use LVL CH as I said earlierwhen below 10 000.As a Pilot you have to make your decission and not just rely on a FMC computer.I wouldn´t be travel with you, if you were one, if you can´t use your brain./ Leffe

If he is experiencing the same issues as me on HF4, the problem is not the FMC but the engine/flight dynamics.On my system was far to decel also with spoilers deployed.

I encountered this 'issue' only once. Suspecting that it was something I had done wrong, I checked the constraints along my descent route. I had somehow set a constraint to 250/5000A when it should have been 250B/5000A or /5000A so the plane did exactly as I asked, and accelerated to 250 even though I was already well into the descent. Use your legs page and check all your constraints. If you feel you need to, add some, after all, you are flying the plane, not the computer.

In the above picture you can see that fmc commands 240kts, but the plane descending is not mantaining that speed. thrust levers are at idle, but idle is wrong, idle is not controlled by fmc. taking manual control will not solve, you must do an holding or use all the possible ways to slow down, this including lower the landing gears, wich helps only a bit.

If he is experiencing the same issues as me on HF4, the problem is not the FMC but the engine/flight dynamics.On my system was far to decel also with spoilers deployed.

One have a lot of tools to disposal.1. Intervene speed when in VNAV2. Change speed on those wp below 10 000 in CDU3. Use Lvl Ch and MCP speed4. Spoiler5. Slow down a lot earlier6. Drop landing gear7. Parachut yourself out...he heIf a Pilot says: Hell what this ac is going to fast!...what are we going to do???I wouldn´t give my money to travel with such a Pilot, that can´t manual take care off it./ Leffe

One have a lot of tools to disposal.1. Intervene speed when in VNAV2. Change speed on those wp below 10 000 in CDU3. Use Lvl Ch and MCP speed4. Spoiler5. Slow down a lot earlier6. Drop landing gear7. Parachut yourself out...he heIf a Pilot says: Hell what this ac is going to fast!...what are we going to do???I wouldn´t give my money to travel with such a Pilot, that can´t manual take care off it./ Leffe

I think you don't understand that the problem is basically that when the issue is present (and in my case it was present also with clear sky configuration) the aircraft won't slow down normally.1. Intervene speed when in VNAV speed intervention will not solve the issue as the aircraft is unable to slow down, it will continue to follow its path with the magenta speed bug far below the ctual speed, that will continue to increase.FMC will firstly tell to add drag, drag will be insufficient and you will take control, the only thing you can do when you are too close to the runway, is to do an holding.2. Change speed on those wp below 10 000 in CDU As the above, you can put also 0 (excessive but to explain) but the plane won't slow down3. Use Lvl Ch and MCP speed You can also switch to speed descend, that is the same of level change with the restrictions of each waypoints, the result will be that the destination altitude cannot be reaced as to mantain speed the V/S will be lower than 1000ft/min.4. Spoiler, thats help a bit, but not as much as required, the aircraft in descend path will need spoilers until over flaps 15, and to slow down to flaps 15 you will miss the runway5. Slow down a lot earlier. With all respect, if the FMC is correctly programmed with a path, a cost index and all other stuff, without winds it MUST descend as programmed, it cannot ask for drag, FMC is designed and programmed to include the required dynamics to make the flight as economical as we want with CI. This includes that we must not use the speed brakes, or other things to slow down the plane, this will mean "more fuel burned"6. Drop landing gear Yes, it helps a bit, but not too much, wit spoilers together helped near nothing.7. Parachut yourself out...he he Maybe... Or simply try to remove SP1, reinstall and see what happen, also uninstal and clean install. If problem is only with SP1, remove it and install only hot fixes.PS: to open the cockpit windows the aircraft needs to be unpressurized and with low speed, so, you cannot ever launch from it without decelerating first :D

basic question - Why is your 'idle' so high? everything else comes from that.

basic question - Why is your 'idle' so high? everything else comes from that.

In HF4 it was an issue, solved with SP1 for me, maybe not for others.Idle is controlled by EEC, it depends on the phase of flight, in the screenshot posted the plane is in idle, AT correctly retards levers, but the idle is not at flight idle. I cannot see N2 from the screenshot and so cannot tell if is currently in approach idle, but for sure it can be.Another solution is to keep pressed F1 or F2 keys, tis will force the basic flight idle (it worked for me), but you cannot fly long time with a key pressed.

I think you don't understand that the problem is basically that when the issue is present (and in my case it was present also with clear sky configuration) the aircraft won't slow down normally./PS: to open the cockpit windows the aircraft needs to be unpressurized and with low speed, so, you cannot ever launch from it without decelerating first :D

No I think you didn´t understood, that you had an bad install before.To parachut yourself out, just make an dive to 5000 feet, then nose up to slow her down....he he/ Leffe

I always landed the plane, sometime overheating brakes because to fast, but the problem was still present, and a problem at all, as in the first fligt you make with it you confide that the plane reacts to the FMC commands as it should be. Then you can either finish the flight, or land in another way.It is obvious that to land AP will be disengaged, an holding will be performed (as the problem was present at the end of descend) slow down manually to put flaps and gears, then restart the approach procedure. The pilot will take the control, but the control of a crazy horse. As soon as the pilot lands he will ask for checks to maintenance personnel, if the aircraft continues with the wrong idle te aircraft will not be dispatched for further flights.So the problem need to be fixed.Now, SP1 seems to solve the problem for most of them with this problem in the past, he must check its installation files, try to uninstall, reinstall and eventually by not reinstalling SP to check if the problem can be solved.This to dispatch a flyable airplane.