A variety of brake pipe pressure leakage rates were recorded, and all of the values met the Class I test criteria. The brake pipe pressure flow rate and gradient values likewise met the Class I test ...

Brake pipe pressure fell to zero only five seconds before the train halted, they said. A reading of zero could result either from a brake application or a severing of the brake pipe during the crash.

A variety of brake pipe pressure leakage rates were recorded, and all of the values met the Class I test criteria. The brake pipe pressure flow rate and gradient values likewise met the Class I test ...