CPSK wrote:A thought; Could the train have lost its brakes due to excessive braking while coming through the switch yard approaching the terminal? I understand that excessive braking can cause air reservoirs to become low or depleted as the demand for air from the reservoir cannot keep up with the compressors pumping air into them.
CP
I know we can't speculate (neither is it healthy), but the chances of this are virtually nil. Brakes are the "fail-safe" component of trains, trucks, and buses. Regular braking does not do much to the air in the reservoir tank. If there was low pressure (60-80 psi), you still would have braking, but it's not a complete loss. If something were to happen to the brake line causing loss of all air pressure (or cause it to drop below 40), the spring brakes would kick in causing emergency braking since there is not enough pressure to hold back the powerful springs which keep the brakes in released mode.
My thoughts and prayers are with all who are involved in this tragic event.