Union Pacific 6936

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Union Pacific 6936
UP 6936 EMD DDA40X.jpg
UP 6936 photographed near Watseka, Illinois pulling a business train.
UP 6936 as it appeared prior to the collision.
UP 6936 as it appeared prior to the collision.
Type and origin
Power type Diesel-electric
Builder EMD
Model DDA40X
 • AAR D-D
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Safety systems Leslie S3LR
Operators Union Pacific
Numbers 6936
Nicknames "Centennial", "Big Jack"
Disposition occasional excursion and revenue service

Union Pacific 6936 is an EMD DDA40X locomotive owned by Union Pacific Railroad (UP). It is the sole example of the "Centennial" type that is still in operation, and thus is the largest operational diesel-electric locomotive in the world. It is occasionally used on both excursion trains and in revenue freight service.

In the early morning on November 30, 2000, UP 6936 struck a dump truck at a grade crossing in Livonia, Louisiana and suffered significant damage to its front end. An employee riding in the nose section was killed in the accident, as was the driver of the dump truck. After the damage was repaired, a winged UP shield logo was applied to the front. It was also repainted in the current Lightning Bolt paint scheme and had a rooftop air conditioning unit installed.[1]

Another collision occurred in 2007, but there were no injuries.[2]


  1. ^ "HO DDA40X w/DCC & Sound, UP/UP Shield #6939". Horizon Hobby. Retrieved February 10, 2017. 
  2. ^ "Accident Investigation Report HQ-2007-29". Federal Railroad Administration Office of Safety. May 16, 2007. Retrieved February 10, 2017. 

External links[edit]

Media related to Union Pacific 6936 at Wikimedia Commons