MSFS2020 PMDG 737-700BBJ - Runaway stabiliser trim.

Flying from RKSI to PASY was largely uneventful. The approach was a thing of nightmares, though.

I was unable to get barometric data from the weather report, and to make things worse, I'd missed getting down to the initial approach altitude by around 1500ft. Not unmanageable, but already had me on the back foot. I probably selected approach mode on the AP at a poorly chosen time, but for the first couple of seconds, it felt like things were going reasonably well.

Then my nose pitched up and all the buzzers started going off.

I was able to wrestle it back up to altitude and went around again, trying to diagnose the problem. The second approach ended much the same. Nose up, stall, nose down to gain speed and eventual porpoise-like recovery. By this time, I'd worked out that I was running out of nose-down trim.

My next approach was smoother, however I floated as I came within ground effect and quickly ran out of runway.

My final attempt is shown here. I elected to approach with a reduced flap setting and at higher speed, and this seems to have paid off.

One thing I did notice was that fuel consumption is not reflected properly when you use time compression or sim rate. If you set the sim to 4x, fuel will only be used at the rate of 1x. Therefore, I was landing with a very heavy plane and likely had some centre of gravity issues.

It was both interesting and terrifying.

[tomatosoupwoo]

There is two switches by the throttle that cutout electric trim, which will y’know, cutout the electric trim from doing shenanigans and you can manually retrim the plane to control yayayayaya :)

[johanleijten]

What makes that you get the glideslope warning. I had the same warning recently but dont know the cause