As this thread has come back to the top, I'll try re-posting this question that I asked a while back with no answer (......think I asked it after the first 225 "Oil-pump/Emergency lube" failure !!)
With the current interest in gearboxes and lubrication (S92, AS332, EC225), can anyone tell me the history of the Emergency Lube system on the S61. It looks as if it was added after the original design (the switch for it is on a separate panel and looks like an add-on) but I have never heard that it was added after any specific S61 incident or accident, so maybe it was there right from the start, or became required by legislation following problems on some other aircraft type?? (I currently fly the S61, so I know what it does and how it works etc, just looking for information on when it was first added to the design).