The findings also concluded operators had no knowledge of any problems , the ride had no mechanical defects , and no other problems had been reported in its 25-year history . Riders must be 54 inches tall to ride without supervision , new rules mandate . Having two riders in each car is `` strongly recommended , '' official 's letter states . Comment: How the girl fell has not been determined ; officials have no eyewitnesses .
Riders must be 54 inches tall to ride without supervision , new rules mandate . Having two riders in each car is `` strongly recommended , '' official 's letter states . Comment: How the girl fell has not been determined ; officials have no eyewitnesses .