Interesting thought re the stud failures on the oil filter housing!
Yes, the hawk MGB oil filter is mounted vertically to the lower sump housing and is actually designed to be accessible from inside the cabin through the ceiling.
Here is everything you ever wanted to know about the UH60 drive system in a nice concise document with lots of pictures (note the explicit entry of "
With a loss of all oil, the main XMSN will continue to operate in flight for another 30 minutes"):
http://aasf3-ny.org/4-Standards/Docu...r%20System.pdf
Look on the lower right
http://www.army.mil/-images/2009/04/...-16-150409.jpg
My understanding - which could be wrong - is that the baseline impurity levels for oil in the can is for larger particulates than the filter. Hence the nuisance bypass pop out indications and hence the reason 'some' (no names, no pack drill) operators use pre-filtering. As mentioned in the report.
This is absolutely the case.