Hi all,

What's going on here: I'm flying down the instrument approach to London Gatwick, intercept the ILS, the aircraft tracks the localizer fine, EFIS is displaying the correct ILS freq. As I come close to intercepting the GS, I see the GS pointer work it's way down the scale then just at the point of interception, the GS pointer disappears and and AP fails to track the loc and continues to fly straight and level!!!

Any one have any ideas on what's happening?

Thanks