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What really is 人身事故【じんしんじこ】 (jinshin-jiko) we often hear at train stations?
Some say that it always means that somebody just threw him/herself onto a
train track and got killed. Others say that it's just any kind of train
accident that involves humans; it doesn't necessarily means somebody lost
him/her life in it.
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2015-08-22T05:06:47.673
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2015-08-23T04:10:07.327
2015-08-22T13:53:03.193
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question
kanji definitions
What really is 人身事故?
The latter is correct.

When an accident happens, the train company need to stop trains and to let
passengers know what is going on right away. Then don't know why the accident
happened yet. Technically speaking, it is police that investigate an accident
and find out the reason.

Right after an accident, often it is apparent to everyone that the victim got
killed, but not always.
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2015-08-22T07:30:42.397
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2015-08-22T07:30:42.397
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answer
It is technically any "accident causing injury or death" however as your
question points out it is generally accepted in society that it means that
there was a fatal injury. In the event that this is displayed on the monitors
it means that the train company had to stop train service (or later service is
delayed) to deal with the accident.

Anecdotal: A friend of mine slipped in the gap between the train and the
platforms and train service was temporarily suspended as a 人身事故
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2015-08-22T08:33:21.083
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2015-08-23T04:10:07.327
2015-08-23T04:10:07.327
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answer