This National Safety Alert provides an update to National Safety Alert No. 5, Cell Phone Results in Fire, dated March 6, 2002, which addressed a flash fire on a platform in the Gulf of Mexico OCS. As detailed in National Safety Alert No. 5, a contract panel specialist worked on an open platform master control panel that used supply gas for the instrumentation. The contractor stated he was carrying a cell phone that was turned on and rang while working on the panel. The employee claimed that when he flipped the bottom piece of the cellular phone to answer the call, a flash fire occurred, causing second-degree burns on his forearms and “sunburn” on his nose and cheeks. At the time National Safety Alert No. 5 was issued, it was believed that the cellular phone may have ignited the flammable gases or vapors in the area of the open platform master control panel when the phone had been flipped open to receive the incoming call.