Whose Problem Is It?

Should have done the re- torque. Most of the bigger tire shops have it on your paperwork that it must be done. Drivers fault, no re-torque and improper pre/post trip inspections.

 

Experience in this industry is always hard earned & Expensive..
You, or I should say Your "friend" has just got some ( Well deserved) experience...

 

The rust stains running off the nut on the wheel are a dead giveaway of a lug nut that needs the air socket.

 

Get your buddy some lug nut pointers. My company puts them on all trailers. For just a little over $30 you can check your trailer lug nuts at a glance.

http://www.finditparts.com/products...0ujrGruVu0IexwjPgORFeyczkOYdrDadg4BoCeGvw_wcB

 

Sounds an awful lot like two people didn't do their job...the guy who torqued the nuts back into place and probably didn't do it right, and the drivers who didn't catch anything wrong after all that time.

My company just had something eerily similar happen or so I hear. The duals apparently came clean off the hub and one of the wheels and tires went bouncing down the road and took out a Lexus on I-80 in New Jersey.

 

What would come off the shaft? Rims, tires? Or could the hub/oiler and or brake drum go too?