Loose bolt discovered on crankcase

While doing an oil change at 525 hours on my 915is in a SlingTsi I noticed a bolt that was loose a few turns.  I tried to find the torque spec in the heavy maintenance manual, but was unable to find it.  I did an AI search and it referenced the MMH 72-20-00 about crankcase assembly torque spec, and the final torque sequence was 50Nm.  I’m assuming this is a primary M10 bolt, but unable to find it called out anywhere.  What are the implications of this bolt getting loose (about 3 or so turns?  Shouldn’t it have Loctite on it?  Could there be any damage? 
I saved an oil sample and will submit it for analysis. 
the compression check was perfect, 4x 80/80.

I torqued it to 50Nm, and put torque seal on it and will check it.  Should I pull it out and apply LOCTITE?