GS Mode inhibit A320

[Speedwinner]

Hello,

Several approaches say that we have to push that button if we are coming from a ils approach. We often approach airports with two parallel runways and often get a swing over. I couldn't find the not in the fctm that we have to push the button for a swing. Is it considered as a circling approach?

Next question was: if we don't push the button during a swing and both pilots switch off their ils button does the system call out a deviation as well? I mean no ils indicated on both pfds and the button not pushed

Thanks !

[friend007]

Hi Speedwinner,

I can confirm from personal experience that both ils pb-sw to off is not sufficient to avoid a glideslope callout. Recently did a sidestep in LYS from 18L to R. The latter has a threshold which is about 1000m closer so an increased RoD was required. We also had both ILS scale off but still got the mode 5. Apparently as long as a valid ILS frequency is tuned and received, the system will give cautions.

Kind regards

[Speedwinner]

Thanks man!

[I love twins]

Have your sidestep ready in the secondary and activate that when appropriate.

Alternative is to switch off G/S Mode on GPWS.

As mentioned, if you do neither, you will get the "Glideslope" callout.

Above information is appropriate for A320. Not sure about other types.