We need to discuss the difference between "Could" and "Should"....which is the key to this situation.
I would reluctantly say "could" but only after the fact and the investigation that showed the Emergency Lube System WAS working although every indication said it WAS NOT. (Unless i grossly confused what the Report had to say.)
Hind sight is wonderful....especially when it is not your precious Ass sitting in the Helicopter when these things happen.