Originally Posted by
Apate
Of course the true "loss of oil" capability will be a huge step forward. However this event highlights that the MGB design also needs to have redundant scavange capability, as the small loss of oil in this case was a consequence rather than the cause. The phase IV MGB press releases don't mention if this is part of the redesigned box, although it has been mentioned many times by Sikorsky in the past as an aim.
Yes, the loss of oil in this event is irrelevant and I was not referring to it at all - simply to the question posed by Paul Cantrell. In fact, the symptoms of this type event are caused by too much oil! The input module fills up and immerses the gears, resulting in huge shearing forces being applied across the oil which heats up very rapidly. The procedure to reduce the engine to idle is to reduce the amount of energy being imparted into the oil, so reduces the rate of heating but does not stop it.