EMPLOYEE WAS WORKING ON HG14 ENTRY #2 AT SPAD 12318. HE WAS ON THE SECOND STEP OF A 4' LADDER, CLIMBING UP TO SET THE SPAD. HE CHECKED THE LADDER BEFORE CLIMBING UP. HOWEVER, THE LADDER BECAME UNSTEADY AS HE BEGAN TO CLIMB CAUSING HIM TO LOSE HIS BALANCE, HE FELL LANDING ON HIS RIGHT LEG. INJURIES WERE A FRACTURED TIBIA AND CRACKED FIBULA.