Any one got any more on the 1985 S-61?
Back then there was a Tee fitting that supplied oil pressure to the torque meter as well as the inputs from the emergency lube system. On the incident a/c this fitting cracked and allowed all the oil, including that supplied from the emergency lube sump/pump to be pumped overboard. As anyone who is familiar with the system on the 61 can tell you, if there is no oil for the inputs they will fry in a matter of seconds.
Okanagan subsequently removed this tee fitting from all their a/c.