Gerstlauer Amusement Rides, the makers of the Texas Giant roller coaster at Six Flags Over Texas in Arlington, says that they are not at fault for the death of 52-year-old Rosa Esparza in July of 2013. The German ride manufacturer says that Six Flags is to blame for the woman's death.

Esparza's family filed a lawsuit against Gerstlauer after she was ejected from her third-row seat as the ride began a steep descent along the track’s first large hill and fell 75 to her death. Six Flags joined the suit against the manufacturer last month claiming that the roller coaster cars seats are defective. Esparza's family has also filed suit against Six Flags.

Gerstlauer backs up their claim that Six Flags is to blame by saying that Six Flags chose not to put seat belts on the Texas Giant and that they also failed to use the provided "Test Seat" that includes a red light that comes on when a passenger's size is inappropriate for the restraint system.

The ride maker is asking the judge to dismiss Six Flags' suit against them adding that Six Flags failed to properly train the ride's operators and that they did not properly perform a "push-pull" test on the ride's lap bar.