San Bernardino 1989 Runaway Train and Pipeline Explosion | Mayday

A freight train barrels out of control toward a quiet neighborhood, then a second disaster ignites days later. What linked them shocked investigators and scarred a town forever. In this Mayday case, Southern Pacific 7551 East races down Cajon Pass toward Duffy Street as crews fight to slow a 69-car load that won’t respond. Black boxes, melted wheels, and a dispatcher’s chilling “mayday” call set the stage for an inquiry that uncovers surprising failures. Why didn’t the air brakes save the day? How did a simple paperwork assumption tip the scales? And how could a buried pipeline erupt into a towering wall of fire more than a week after the derailment? Follow the NTSB’s step-by-step hunt for the hidden connection, from the locomotive cabins to the Kalnev fuel line beneath San Bernardino. The answers are as human as they are technical. Watch to see how small decisions created a runaway chain of consequences. Watch now to learn what really happened—and why it still matters. #SanBernardino #RunawayTrain #CajonPass #TrainDerailment #PipelineExplosion #Mayday #Documentary