Hi MM43. One way to achieve a tight ground referenced turn radius is to accomplish the majority of the turn in the vertical. This may be indicative of a LOC incident early on.
Gimbal angle limits on a satellite antenna could well explain a drop out, but the satellite data drop out seems to be much later than the initial deviation, so perhaps a second unusual attitude at that time??? I'm still trying to make some sense of the information at hand without too much luck.
