If I am using VNAV for the climb with a SID programmed in with three height constraints say 4000ft, 5000ft and 6000ft at waypoints along the SID. Then just after takeoff ATC gives me an immediate climb to FL180. Do I select FL180 in the MCP altitude window, then press the Altitude Intervertion button three times or is there a better way.

select FL180 in the MCP altitude window, then press the Altitude Intervertion button three times

That's probably the best way.

all you need to do is to select your alt in mcp hit alt int no need to click three times

all you need to do is to select your alt in mcp hit alt int no need to click three times

 

I could be wrong, but I thought ALT INT only cleared the next restriction, so if you have three restrictions you would have to press ALT INT three times.

I could be wrong, but I thought ALT INT only cleared the next restriction, so if you have three restrictions you would have to press ALT INT three times.

 

Thats the way I see it, but it seems odd having to hit the switch 3 times, which is why I posed the question. I have just looked in the FCOM but it doesn't give an example of this scenario.

 

Any real pilots out there could answer this please.

all you need to do is to select your alt in mcp hit alt int no need to click three times

I'm no expert, but this was my understanding too. If you do an altitude intervention, then i would think that whilst still in VNAV mode, the aircraft will ignore the preset altitudes in the FMC legs page, until after achieving the MCP altitude set when you pressed the ATL INT button.

 

Regards,

Each time you hit it, it clears 1 restriction. In your scenario, 3 clicks is what you need.

 

Works great.

 

I don't have my books handy, but this is from RW operations.

yea you right each push of the alt int clears the fmc restraints so guess you have to make sure you keep count hoiw many times you press the alt int button

Just look at the legs page. The restrictions will clear as you push the ALT INT button.

Each time you hit it, it clears 1 restriction. In your scenario, 3 clicks is what you need.

 

Works great.

 

I don't have my books handy, but this is from RW operations.

Like i said. I'm no expert, so i learned some more today.

Thanks Matt.