backcourse ILS accidental track ?

[Guest noflyzone]

hello gentsmaybe this is a dumb question - is it possible to track the backcourse of the ILS and never get a glidescope capture, but keep getting the LOC capture until you get too far out and lose LOC altogether?I was in the wrong position to capture the ILS for Rwy25 - instead i maybe 5 miles SW of the opposite end of the Rwy (Rwy07), with my nose pointing about 240 degrees, when all of a sudden LOC captured, the aircraft turned and continued straight. I never captured GS.can someone explain what happened?cheers-mike

[Guest Calum]

Hello Mike ,Does the DME display in the bottom right of the ND when it captures the LOC ? Also does the G/S track on PFD and ND not show up at all , or is it there but the Magenta " o " is always at the top ?Then there is the obvious , make sure there isnt a near-by airport that you have mistyped the Frequency of into the ILS Freq.Try switching to the " ILS " ND screen using the EFIS control panel and let me know what it is you see happen :)Calum

[Guest noflyzone]

Calum,greetings,NO DME display after LOC captureGlidescope is there, but you are correct, magenta ball is always at the top.ILS was programmed for the airport and validated to be correct. I checked database in the MCDU and manually verified it was the proper one.I will try to duplicate the flight again and take further notescheers-mike

[Guest Calum]

Hello Mike ,It turns out you cant have a G/S on a backcourse ILS ( common sense lol , in case it is a different app. Gradient i suppose ). So you can track the LOC all the way in , but you must switch to visual or use the VASI.Sorry for the wasted time hehe :)Calum