Hello there,

 

I have a strange problem that is giving me headaches for weeks now. So right to it:

 

I set a route in the FMC, select SID's and STARS etc. and everything is going well. Then I select for example a 26k Thrust settings and go to the takeoff page. There I enter the calculated v-speeds and as soon as i enter the v2 speed, the FMC gives me an "UNABLE NEXT ALTITUDE" error. I know this is due to an altitude restricion in the selected SID. The real problem is that the FMC now calculates a very low climb rate and thinks he can't reach that very altitude restriction. But i flew that SID manually and had to realise that it is perfectly doable. I really don't get it.

 

I would love some help, since i couldn't find a solution yet. I hope i'm making a simple beginners mistake.

 

Greetings,

Tony

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Nevermind!

 

The mistake was a true real life aviation problem that already caused dangerous scenarios: my weight system was set to kilogramms, but i entered my grossweight in lbs.

 

164.1 kg is a little too heavey

 

So glad now. I'm finally back up there