Abstract: At 1:02 p.m. on July 4, 2011, an accident occurred in the International Terminal, Baggage Handling Area G at the San Francisco International Airport (SFO). Employee #1 was a Junior Technician, and had been working for the employer for over one year. Employee #1 was walking down the catwalk and stepped on the conveyor in an attempt to "crossover". The employer, Elite Line Services, is a maintenance services contractor responsible for the maintenance and repair of baggage conveyor systems at the SFO International Terminal. The job site is a baggage conveyor system located at section XR1-10 and XR1-11 at Area G. Adjacent to the baggage conveyor system is a catwalk that workers use to access various sections of the system. Sixty-two sections exist on this particular powered conveyor baggage handling system. Between sections of the powered conveyor system are nonpowered rollers. Employee #1 stepped between the roller and the conveyor belt. Why Employee #1 attempted to "crossover" at this particular section is not known. Walkways exist over the baggage handling system to allow employees to safely pass over or cross the conveyor system. Employee #1 was not engaged in servicing or repairing the conveyor at the time of the accident. Employee #1 received medical treatment at Mills Peninsula Hospital for a contusion (bruise), but did not suffer a fracture, laceration or blunt force trauma and was not hospitalized. Employee #1 was discharged from the hospital within three hours.