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(Photo courtesy of Associated Press)
The engineer of the New York City-bound passenger train fully applied the locomotive’s emergency braking system as it entered the left-hand curve in the rail line, where the maximum allowed speed is 80kph, Sumwalt told a news conference hours after the NTSB began its probe.
But the brakes managed to only slightly slow the train from 171kph to 164kph in the few seconds before the locomotive and all seven passenger cars derailed, he said.
Asked how long it should take to slow a train moving that fast to the posted speed, Sumwalt said: “He was already in the curve at that point. You’re supposed to enter the curve at 50 miles per hour [80.5kmp].”
Philadelphia Mayor Michael Nutter reacted with dismay to the disclosure, calling it “astounding, devastating”.
Authorities have offered no explanation for why the No 188 train, which originated in Washington DC, and had stopped in Philadelphia’s 30th Street station about 20 minutes earlier, was travelling at more than double the authorised speed.
Sumwalt said NTSB investigators had not yet interviewed the engineer, who was injured in the wreck, but planned to do so in the next couple of days.
“This person has gone through a very traumatic event and we want to give him an opportunity to convalesce for a day or two,” Sumwalt said. “But that is certainly a very high priority for us.”
Nutter has said the engineer gave a statement to police, though officers have declined to comment.