If, however, we scoped the job to examine in depth events leading up to the disaster, what went wrong, and why it went wrong, this would be a case study.
You could call this a case study if the job's scope included examining events, that led up to the disaster, in great detail.
There is no scenario in which this would be considered a case study.
People are walking on the mountains.
The man is at home.
Dog jumping to catch a ball.
A passenger on a plane is holding a child.
A dog sleeps in a forest.
The couple is using umbrellas because it is raining.