Going from VNAV ALT back to VNAV for climb....

[JSACKS 0]

When I am climbing and enter VNAV ALT and level off at the existing MCP ALT, after I enter the new MCP ALT cleared by ATC, I press the ALT button once to revert to VNAV climb. This works. But why do I have this thought going round in my head that if I hit that same white ALT button in some other way, it wipes out the next restriction ahead and above me during a VNAV climb? Jonathan

[michal 44]

>head that if I hit that same white ALT button in some other>way, it wipes out the next restriction ahead and above me>during a VNAV climb? Not sure what you mean "hit in some other way", it is true that hitting this button multiple times is supposed to erase some other altitude restrictions - as the manual explains in better detail.Michael J.http://www.precisionmanuals.com/images/forum/pmdg_744F.jpghttp://sales.hifisim.com/pub-download/asv6-banner-beta.jpg

[JSACKS 0]

I think I got it: if you have an FMC alt restriction between your current ALT and the alt you set into the MCP, hitting the ALT button erases the FMC restriction in a VNAV climb. Before I re-learned this tonight, I had a restriction ahead but it was HIGHER than my MCP ALT and I was puzzled why it wasn't getting erased, hah !Jonathan

[Guest D17S]

Makes perfect sense. Nice find. What's next!?

[crvm 0]

>>>When I am climbing and enter VNAV ALT and level off at the>existing MCP ALT, after I enter the new MCP ALT cleared by>ATC, I press the ALT button once to revert to VNAV climb. >This works. But why do I have this thought going round in my>head that if I hit that same white ALT button in some other>way, it wipes out the next restriction ahead and above me>during a VNAV climb? >>Jonathan Simple, simply push the VNAV button once AGAIN instead of the alt inter knob.................Randy J. Smith................A PROUD MEMBER OF THE PMDG BETA TEAM[h4]Evolution is a process that results in heritable changes in a population spread over many generations[/h4]

[michal 44]

>your current ALT and the alt you set into the MCP, hitting the>ALT button erases the FMC restriction in a VNAV climb. I also works for descents.Michael J.http://www.precisionmanuals.com/images/forum/pmdg_744F.jpghttp://sales.hifisim.com/pub-download/asv6-banner-beta.jpg