Originally Posted by
SansAnhedral
Simply because this particular incident didn't lead to an actual full oil-out condition since they were already on approach (it would only have been a matter of time with the leak as described) doesn't change the issue that the S92A MGB cannot operate without oil for more than approximately 8 minutes.
The fact that it holds Part 29 certification despite this is mind boggling, particularity since there have been enough incidents of leaks from the MGB case to make the "extremely remote" 10^−7 occurrence clause statistical nonsense.
Weren't they on their way back? So it could have been losing oil for the previous 2 hours or so... it was hardly a catastrophic event.
The gearbox has a good record.