I have had two MRGB chips offshore in Puma. One was shortly after the box produced some fine chips in a previous flight. Thankfully not too far offshore, turned around. Second was waaaaay offshore and out of the blue. Landed on a ship, where upon investigation, some decent chips were found. Hover checked and found some more. Left the machine there and picked up to gladly go back to shore.
Both of those boxes were replaced.
In my experience, and most importantly from what I have been told by olds-and-bolds, is that French machines don't produce chips unless there is something wrong (unlike Yank machines). If there is a chip-trend on a French machine (i.e. another indication after cleaning the plug), I wouldn't be taking it offshore. They can sack me, but there's no way I would do it. Call me a chicken, but that's just my policy (before the latest event).
Just sayin...