As part of your SOPs, are you required to check your altitude when passing the Final Approach Fix inbound?
Look at this ILS. You should verify your altitude on the GS at EISEN as 1500'. Then you're guaranteed to be on the proper GS.
Second, with a groundspeed of approx. 140KIAS your sink rate should be about 700-800fpm.
Have a look at the following note. The first false glideslope is at 6 degrees and *reversed*. That's a big warning right there. The second false glideslope is at 9 degrees and properly sensed. That's three times steeper. If you need a sink rate of 2100-2400fpm just to maintain the glideslope then something is definitely wrong!
ILS (Instrument Landing System)
False signals may be generated along the glide slope in multiples of the glide path angle, the first being approximately 6º degrees above horizontal. This false signal will be a reciprocal signal (i.e. the fly up and fly down commands will be reversed). The false signal at 9º will be oriented in the same manner as the true glide slope. There are no false signals below the actual slope. An aircraft flying according to the published approach procedure on a front course ILS should not encounter these false signals.
Finally, the proper spelling is "lobe".
