What is the first action crew members should take during an emergency application of brakes?

In the context of railroad operations, when there is an emergency application of brakes, the first action crew members should take is to give an emergency radio transmission. This step is crucial because it establishes immediate communication with dispatch and other relevant personnel about the situation. An emergency transmission alerts everyone involved to the possible dangers or issues being faced by the train, allowing for a coordinated response to the emergency. It ensures that the necessary safety protocols can be activated swiftly, and it provides real-time updates on the situation.

While ensuring the passengers' safety and inspecting the train for damage are indeed important steps that need to follow the emergency transmission, those actions are secondary to the need for immediate communication with dispatch. Notifying the dispatcher is essential to mobilize resources and inform other trains or personnel of the emergency, which can help avert further incidents or hazards on the rail network.