Abstract: At approximately 1:20 pm on January 24, 2009, Employee #1, with a janitorial service company, was using nonsparking hand tools to scrap magnesium residue and scale from the door and inner surfaces of a Honeywell Aerospace #4 Al Vacuum brazing furnace. A coworker was using an industrial Tiger Vac vacuum cleaner to collect the loose magnesium material. When a smoldering pile of magnesium entered the vacuum cleaner, the dust inside ignited. Flames emitted from the vacuum cleaner's exhaust and burned Employee #1's back and right arm. He was transported to Little Company of Mary and subsequently transferred to Torrance Memorial Medical Center, where he was admitted for treatment of third-degree burns, which required skin grafts.