Hello,let's say ATC clears me to climb to FL230. Ok so I climb to 230 using VNAV. After cruising some time at FL230, ATC reclears me to climb to FL330.So I select 33000 in the altitude window on the MCP, but the A/C still remains at FL230, of course. My question is: where is the button that I have to push in order to initiate the VNAV-climb? In 747-PS1 you have to push the altitude selector button and the VNAV climb starts. But in the 737, you cannot push the altitude selector...you can just select an alititude.I worked around this problem by turning VNAV off and on again but a think that's not the way it should be handled.So where's the magic button?Thanks!MalteP.S. couldn't find it in the manual (VNAV-section)

Make sure you have ample distance (100 miles or so before TOD) for the climb. Hit ALT HLD. Reset the MCP to 33000, go into the FMC CRZ page and change the CRZ ALT to 330 and engage VNAV. That should get you going. Please be advised that the new patch coming contains many addtions in the FMC, so this is temporary solution here ;)....[h4]Best Wishes,Randy J. Smithhttp://img.villagephotos.com/p/2003-5/196432/winglets_lg.jpg

Hello Malte,I am pretty sure when you have a flight plan in the fmc and your cruising alt is fl330 when you are at fl230 as requested by atc then the vnav will disconnect automatically and leave the plane on alt hold and speed hold and when you are cleared to fl330 and enter the 330 in the alt mcp window vnav will automatically come back on.well at least this is what happens to me when I flew with atc! and vnav.PS the plane will not climb above the alt in the mcp window! if autopilot is on and vnav.Hope this helpsMark.

if it does not automatically come on, click it :)

He never told us his CRZ ALT, I would assume FL230 was his CRZ ALT. If you level off at an altitude set on the MCP that is lower than your set CRZ ALT (remember here he did not say what that was) the FMA will go **FMC** SPEED/ALT HOLD, so all one would need to do is reset the MCP to match CRZ ALT and hit the VNAV button. [h4]Best Wishes,Randy J. Smithhttp://img.villagephotos.com/p/2003-5/196432/winglets_lg.jpg