It's not like he called the IBT.
He gave the preloader several chances before notifying his sup.
He handled it correctly.
I think the OP is very lucky the preloader didn't call the Union and report this.
This is the problem that always happens with safety committees. The members start getting this sense of power, and basically become managements little boys. There is simply no reason to HAVE a safety committee, the management team should take care of safety issues. You have a safety issue? Simply report it to management.