I can't tell from the pic, but I would make sure your guy used new multi star washer and spindle nuts...even with no oil, that spindle and bearings are monsters, but it clearly looks like some forgot to add fluid, if you had a leak...you would have known it, you would have 80/90 GO slung all over the inside of the rim and other places....assuming you are doing post and pre run inspections.
having been a flight engineer for 10yrs in the Army, I learned a valuable lesson that I use to this day and pass on to all my customers and friends of MV's....treat the vehicle like an aircraft you are flying in...pre and post flight inspection...I cannot tell you the number of things I have found while adhering to this philosophy. I do a full undercarriage "wipe down" after a long day out...what that meant in the military was if you were wiping it down, you were touching it, if your touching it, your looking at it, plus by alway doing this you can check nuts, bolts, leaky seals, things that don't look the same way they did on the last wipe down....from experience....I Red X'd to helicopters in a 1/2period we were supposed to fly in one day, the pilot said "someone up there don't want us to fly to today" so we called it a night...one issue was a major crack in the transmission support blocks....I found this visually, the other air craft was the tail rotor drive shaft bearings were shot, each one would have resulted in a Class A catostrophic accident....but all averted by doing the same mind numbing "wipe down"
