BW2,
Sorry to hear yet another story about broken spring hangars! Aren't the frames and suspension covered by Lippert for about 5 years or more? Even if they aren't still under warranty you'd think they'd want to make it good for you.
Just yesterday my brother came over to help me with some things around the house and RV. I had him check all the suspension stuff and thankfully he said he couldn't find any problems. And that includes checking the U bolts! So I'm a happy camper at this point. But every time I read a story like yours I want to crawl under the rig and check everything again!
Good luck and let us know how it turns out for you.
HamRad