Override FMC

[Guest Martijn4u]

Hello,I can't seem to override the FMC once its programmed.How do I let the MCP override the FMC?Thanks,Martijn

[Chaos81 110]

What exactly are you trying to do?

[Guest Martijn4u]

For example, when I set the v/s to +2000 and select the v/s button, it won't do it. Same with speed and sometimes. Tried to play with the a/t and f/d but that didn't seem to do the trick.

[Guest flytrumpet1]

Hi,i'm no expert(yet...)But i think that if you hit FLCHG,you will regain control of the alt and speed,until you engage VNAV again.Richard

[Guest Hawkeyeted]

.....or the HOLD button under the alt display on the MCP. That will put you in SPD mode. Dial in your new altitude and/or speed, press the V/S button, dial in your V/S, and away you go.

[Qavion 19]

You should be able to transition to V/S from any mode (except if you have captured the Glideslope). Can you post a screenshot of your MCP and PFD when you are experiencing this problem?"For example, when I set the v/s to +2000 and select the v/s button,"I guess you mean "when you select the v/s button THEN set the V/S to +2000"?Were you approaching your MCP altitude very quickly (I had similar problems today, but I was doing things pilots wouldn't normally do... like approaching the runway in V/S mode at 260kts with spoilers extended and no flaps. The aircraft was transitioning to ALT HOLD and the V/S window was blanking)Cheers.Q>