After an emergency brake application, what must be checked regarding the train?

In the context of train operations following an emergency brake application, it is crucial to inspect for any cars that have derailed. After a sudden stop, the safety and integrity of the train must be verified to ensure that all cars are properly aligned on the tracks and there are no hazards caused by a derailment. This safety check is essential in preventing further incidents and ensuring the crew and passengers are safe.

While ensuring the train is at a complete standstill and confirming that all passengers have exited may be important steps in the emergency response protocol, they do not address the primary concern of ensuring that the train remains on the tracks, which is critical for safe operations. As such, inspecting for derailed cars is the focal point following an emergency brake application.