HelloI would like to know which is the procedure to disangage teh APP during landing. It has happened I disangaed the app to follow a VOR before landing but it seems is not possible. Everytime I disangaed/engaged the A/P the app turned on. And no success switching to VOR/LOC or HDG.I had to made a G/A ?Thank in advanceAndrea

HelloI would like to know which is the procedure to disangage teh APP during landing. It has happened I disangaed the app to follow a VOR before landing but it seems is not possible. Everytime I disangaed/engaged the A/P the app turned on. And no success switching to VOR/LOC or HDG.I had to made a G/A ?Thank in advanceAndrea

To exit the APP mode, you can detune the ILS freq. I think there are a few more ways. Maybe cycling the Flight Directors off then on . . . and TOGA, of course. There's a list somewhere, but I'm too tired to find it in the handbook.This leads one to wonder why you'd want to exit the APP mode to follow a VOR. If you're landing - you probably wouldn't be switching from an ILS to a VOR.Have fun!

Once the Loc and GS are captured, you can only exit approach mode using TOGA.

Once the Loc and GS are captured, you can only exit approach mode using TOGA.

I finally found the list in the System Handbook:After localizer and Glide Slope capture, APP mode can be disengaged by:- pushing a TO/GA switch- disengaging autopilot(s) and turning off both F/D switches- retuning the VHF NAV receiver

This leads one to wonder why you'd want to exit the APP mode to follow a VOR. If you're landing - you probably wouldn't be switching from an ILS to a VOR.Have fun!

Could a pilot want to de-select an ILS in order to switch to another ILS (because the wrong ILS would have been selected in the first place or because ATC re-assigned you to another runway)?I wonder if this ever happens in real life.Bruno

Could a pilot want to de-select an ILS in order to switch to another ILS (because the wrong ILS would have been selected in the first place or because ATC re-assigned you to another runway)?I wonder if this ever happens in real life.Bruno

I am not a pilot, but in either of the above scenarios I would expect a go-around would be the only sensible thing to do. Glideslope capture comes pretty late in the proceedings.Peter

Could a pilot want to de-select an ILS in order to switch to another ILS (because the wrong ILS would have been selected in the first place or because ATC re-assigned you to another runway)?I wonder if this ever happens in real life.Bruno

Like Peter said, you usually wouldn't be established on one approach and then switch to another approach in IMC (in clouds) conditions. However, some airports it's sometimes easy and convenient to simply "slide over" to another close runway (maybe a parallel). In that case, you wouldn't want the ILS of one runway on and land on another because might start getting glideslope warnings, etc. For example: At Detroit Metro, ILS 22L and 22R, when we checked in with tower on the ILS22R, we'd often request visual 22L. That way we'd have a much shorter taxi to the gate. We'd simply detune the 22R ILS and fly visually. If the other guy was sharp, he'd quickly retune the other runway ILS, but it wasn't required.Good questions.

Thanks to allI saw the replies only now....CIAOAndrea