The Canada TSB web site report on the S92 accident has some good info , there are many similarities between the Uh60 and S92
Transportation Safety Board of Canada | | A09A0016 | Sikorsky S92-A
http://www.aerotecdata.com/pdf_files...er_manuals.pdf
Or you may want to lay out $75 for a flight manual , not sure if it includes diagrams of the power train .
UH-60 Blackhawk Helicopter
Or here for only $13 , I may buy at that price.