Abstract: At approximately 11:31 a.m. on September 22, 2010, Employee #1, a lather, was working from a scaffold to install an exterior lath corner bead in preparation for the application of stucco to a newly constructed single-family residence. Employee #1 placed two six foot horse scaffolds along the south side of the residence. He then placed a single standard scaffold plank on the second scaffold load rail that was located about 64 inches above the ground. As Employee #1 accessed the scaffold plank and prepared to install the horizontal corner bead along the exterior eave, he reached for his hammer and lost his balance. The scaffold then tipped over, causing Employee #1 to fall. He attempted to jump clear of the falling scaffold, but landed on his back across the scaffold. Emergency services were contacted and, upon arrival, Employee #1 was taken to Methodist Hospital of Southern California, where he was hospitalized and treated for multiple fractures to his ribs and a ruptured spleen. The accident investigation concluded that Employee #1 had placed and accessed a single scaffold plank that was greater than four feet above the ground without fall protection. The employer was issued a citation under T8 CCR 1647(e)(2) for this violation.