I guess it was FS being dumb, here is what a quick traffic pattern resulted in at Kennedy keep in mind that I didn't do any number crunching as this was a test only. This first shot was to show I manually tuned the radio, btw there was no weather everything was calm.I configed for the approach early just to show that was nothing to make the autopilot do anything but fly a stable heading and altitude I must have timed it just right as both the loc and glide came alive at the same time, but as you can clearly see it captured the loc and didn't race to the glide, like its supposed to. I'd say this thread is closed and a clear example of how FS can mess up, just to scare you.

Heavy stuff Jared!Regards,Harry

OK, intercept LOC with 21nm or more away from the runway. Of course there is no signal for the GS at this distanceJust wait until you receive the GS signal and see what will happenThe aircraft will pitch like a rocket whether you are on profile, V/S, Idle Clamp, or HOLD. Whether in magenta or in white. Whether with auto tuning or manual tuning.Regards,Emad

Here's an example of how it works in the real aircraft.

I'm flying the FSX MD11, and find that it behaves in exactly the same way.Martin

This doesn't happen in my set-up and would certainly be unacceptable in reality.It would help if you could somehow film these events so that we can get a complete picture of the situation, particularly the FMA readout.Are weight and balance and stabliser trim within limits? Is there a spurious keystroke or joystick command/button mapped to a pitch function that is activating by mistake? Any add-on wind/weather programmes?Assuming all systems are functioning normally the FMA sequence should be:-when on intercept heading, push 'appr/land':151 thrust / land armed heading 240 ap1 / hold 2000-at loc capture the afs arms the g/s automatically and tracks the loc beam:151 thrust / loc ap1 / land armed hold 2000-fma indication at g/s capture:151 thrust / loc ap1 / land armed g/s-10 secs after descending below 1500ft:151 thrust / loc ap / g/s dual landChris