OK, an answer of sorts.
I hate to see serious questions left unanswered. So, I'll address this very uncomfortable question.
First, just as birth is a unique event (and every birth chart different), so is death a unique event -- and every death chart will be different.
Second, there are some patterns that we find in the various charts of those who have died that are common to other deaths. That is not to say that they are that common or that, if found, they will mean that the chart-owner will die.
Third, the nature of the person's chart, the life that they lead, and current transits may in total suggest what aspect patterns are difficult ones for them. Since every symbol has many possible meanings, you can't just assign a "book" meaning to a pattern that says "death".
Fourth, I was asked once to advise a person as to whether they would die. It was for a very special person in the astrological world who did not trust any other astrologer with this significant question. In her case, I did offer the advice asked for. She had the perspective to deal with this situation (she was not sick as such, just advanced in her years) and had the time to prepare others around her for this event. The date/time given was several months ahead and she did pass on within a few minutes of the date/time given to her. I was privileged to be asked to finish up her case load for her. Other than that, I don't agree to do this kind of astrological work, directly or indirectly for clients. I don't do it for myself, nor do I worry about it. I live my life and don't follow charts other than to study some aspect of astrology that I'm working on.
I hope this helps. Dave