Abstract: On January 12, 1999, Employee #1 was engaged in cleaning in a building that was utilized by two aircraft engine rebuilding and repair companies. He apparently entered a darkened room or area and fell 8 ft onto the concrete floor of an unguarded storage pit. Employee #1 suffered major head trauma and was killed. He had fallen either from the floor edge of the storage pit or from a stepladder that was sometimes used to access the pit. Employee #1's body was found by a security guard in a part of the facility that belonged to another company in the building. Apparently, Employee #1 was not authorized to enter this area of the facility. Factors contributing to this accident were Employee #1's unauthorized entry into this darkened area and his misjudgment of a hazardous situation. He was not an employee of the owner of the property.