rhagfo wrote:
:h
When was the last time you inspected your brakes?
That could have been ugly, glad it got fixed without major damage.
PA requires a YEARLY inspection on any trailer 3K and higher GVW.
Part of the inspection is to PULL and inspect at least one drum and brakes on each side. So the OP has a 50/50 chance that the bad brake was or not inspected during the last inspection.
Trailers live most of their lives SITTING so chances are the brake assemble rusted causing the brake shoes to overheat and burn up..