Investigators interviewed the engineer and the qualifying conductor, who were in the lead locomotive during the accident trip.
Cummins receives Tier 4 cert. for QSK95 locomotives
At 4400 hp (3281 kW), the QSK95 achieves the highest output of any 16-cylinder high-speed diesel and is capable of a top speed of 125 mph (201 km/hr) as a prime mover.