The National Transportation Safety Board says Metro-North needs to replace thousands of bolts on more than 400 of the railroad’s newest Kawasaki Heavy Industries Rolling Stock Company M-8 train cars. The NTSB released a report earlier this week that stemmed from a derailment in Bridgeport, Connecticut, in May of 2013, that injured dozens of people. The NTSB said the bolts are too weak.
These are the bolts in between train cars that hold two cars together. The NTSB says the bolts didn’t cause the derailment, but their failure made the two-train collision worse.