Simples question....

[Domestos]

I'm departing EGLL on the DET2F SID. My imaginary ATC has cleared me straight away to FL310. What's the procedure to remove the alt restriction in the FMC for 6000 until DVR?

 

Thanks.

 

Jim

[mfor]

Pressing the DEL (delete) button and then the button right to the restriction you want to remove, works for me.

 

[Domestos]

Thanks!!!

 

[mmerelles]

5 minutes ago, mfor said:

Pressing the DEL (delete) button and then the button right to the restriction you want to remove, works for me.

 

 

Be cautious about this! Pressing DEL on the LEGS page and the soft key next to the restriction will remove BOTH SPEED & ALTITUDE. Altitude clearing from ATC does not implies SPEEDING clearing as well -if any-. So this procedure works well to remove a waypoint altitude restriction having no mandatory speeding constrain as well.

 

you need to go CLB page and delete ALT restriction from there (right side), not to mess speed -if any- (left side)

 

[mfor]

That doesn't work for me with IXEGs FMC unfortunately.

You can reenter the speed restriction after clearing all restrictions on the legs page of course by leaving the alt parameter blank e.g. 220/  

Edited September 24, 2018 by mfor

[Iain]

On 9/24/2018 at 12:39 PM, Domestos said:

I'm departing EGLL on the DET2F SID. My imaginary ATC has cleared me straight away to FL310. What's the procedure to remove the alt restriction in the FMC for 6000 until DVR?

 

Thanks.

 

Jim

Please remember, these sort of changes mid flight exposes the weak points in the FMC, the VNAV can get a bit lost and your TOD becomes completely screwed, not always, but for me it's best to put restrictions in or bypass restrictions before leaving the gate.  Then once in the air, double check the TOD is correct.

 

If I do on the fly changes to simulate ATC clearing me higher, which is quite common for departures from London area where the SID has you at 6000ft a very long time, I usually just line select the first waypoint that has no restriction and click it to the top of the list.  I found this way to give less problems. 

Worst TOD fail I had was flying to Svalbard, ended up at 10'000ft in a steep dive towards the Barents sea, you can see the profile here, not pretty!

https://www.virtualnorwegian.net/pirep/138971/

Edited September 25, 2018 by Iain