"For an overheating alert, the protocol calls for the train to stop and for the conductor to touch a waxy stick to the suspected defect to see if it melts the w

"For an overheating alert, the protocol calls for the train to stop and for the conductor to touch a waxy stick to the suspected defect to see if it melts the wax" I chuckled to myself a little at the thought of a conductor trying to get through flames to be close enough to touch the waxy stick to the flaming axle.