EE, EQUIPMENT OPERATOR, WAS DOING PRE-SHIFT INSPECTION ON AN END DUMP HAUL TRUCK. HE TRIPPED, BROKE HIS FALL WITH HIS RIGHT HAND. HE COMPLAINED TO SUPERVISOR AT 9:30 PM THAT HIS R SHOULDER WAS HURTING. HE WAS TAKEN TO DR AND RELEASED WITH RIGHT ARM IN SLING. A RETURN VISIT WAS SCHEDULED TWO WEEKS LATER.