[davidmanze]

Just speculating, had the camera been pointed at the sun for too long at some point? That could burn a hole in the shutter. I can't imagine another way for such localised damage.

 

The cases of shutter failure I've seen are more mechanical in nature.

Good suggestion Popo,   Arthur, is the holed shutter made of metal?  if it's steel I doubt if it's sun burnt, also could have been a short circuit , maybe a denuded wire briefly touched the shutter, that could explain the black deposits. let's see the photo!     Strange.