Gulli....you must be a Yankee.....as we Southerners tend to move a bit slower than them folks from up North.
There's a only a very few things in a Helicopter that must be done "Immediately" and "promptly".
I submit there was more to this Engine problem than a mere loss of oil pressure indication.
Engine Turbines usually fly apart from Turbine Wheels shattering while bearings heat up and cause a racket long before they seize from lack of lubrication and give off some aroma of very hot oil
My only engine failures were in a Chinook and a Hughes 500D and none involved a shattering of Turbine Wheels.
I did see evidence of some small pieces of Turbine Blade being spit out the front of a Lycoming T-55 after some FOD and the Hughes engine seized due to a Bearing Failure..