Yesterday in order to make a left break for circling I was unable to switch from APP mode (descending the ILS path after full est) to HDG and ALT HLD mode.

Which is the correct MCP procedure to do that?

Thanks in advance.

 

Fabio

you need to deselect both fds to get out of the app mode

you mean i have to switch off both fds on mcp and then select the new mode?

you mean i have to switch off both fds on mcp and then select the new mode?

yes

found!

on FCOMv2 page 200: so rigth procedure is disengage ap, switch off both fds, engage ap, switch on fds, select new mode.

thanks & ciao

Pushing TO/GA or retuning the VHF NAV reciever will also work.

In my opinion, I find it dangerous to capture the ILS before circling because the plane will not level off at the MDA. So I fly these in vertical speed mode. Basically the GS INOP procedure.

 

Now I wonder, how is it done by real life pilots?

 

Ryanair does it in VNAV so to see.

 

http://www.smartcockpit.com/pdf/plane/boeing/B737/diagrams/0010/

 

Bert Van Bulck

Basically the GS INOP procedure.

Yep, just V/S down to your MDA.

If you're going to do a circling approach using HDG SEL, you should use VNAV or V/S to get down the first part of the approach - don't lock on to a ILS signal. The AFDS is specifically designed to lock out other modes once you have an ILS signal captured as switching out of VOR/LOC or G/S inadvertently in IMC while on a coupled approach could be disastrous and result in a CFIT accident.

If you're going to do a circling approach using HDG SEL, you should use VNAV or V/S to get down the first part of the approach - don't lock on to a ILS signal. The AFDS is specifically designed to lock out other modes once you have an ILS signal captured as switching out of VOR/LOC or G/S inadvertently in IMC while on a coupled approach could be disastrous and result in a CFIT accident.

Ryan think the op just wanted to know how to turn off the app mode, I think he just wanted to do another approach by circling around for another go thats the way i read his post or the other way he could have done it is doing the go around proceedures by pressing the ga switch.

Ryan think the op just wanted to know how to turn off the app mode, I think he just wanted to do another approach by circling around for another go thats the way i read his post or the other way he could have done it is doing the go around proceedures by pressing the ga switch.

 

Well I'm sure the OP can clear this up for us, but there are a number of approach procedures where you first follow the ILS for one runway, then at a certain point break-off and visually circle around to land on a different runway. It sounds to me like the OP wants to do one of those.