The FAA TCDS (type certificate data sheet) is a good source of performance information and in the case of the S92 there is no mention of a run dry capability. I would have assumed that if so certified then it would have warranted a line.
What it does say is (the capitals are theirs not mine).
THE HELICOPTER MUST BE OPERATED IN ACCORDANCE WITH THE OPERATING LIMITATIONS SPECIFIED IN THE FAA APPROVED ROTORCRAFT FLIGHT MANUAL.
No mention of operating it in accordance with the manufacturers sales blurb.
I am truly grateful that I have never found myself in a similar situation to this. The man who thought of the expression caught betwen a rock and a hard place must have had this crew in mind.