On September 17, Army lieutenant Thomas Selfridge rode along as his passenger, serving as an official
observer. A few minutes into the flight at an altitude of about 100 feet (30 m), a propeller split and shattered,
sending the Flyer out of control. Selfridge suffered a fractured skull in the crash and died that evening in the
nearby Army hospital, becoming the first airplane crash fatality. Orville was badly injured, suffering a broken
left leg and four broken ribs. Twelve years later, after he suffered increasingly severe pains, X-rays revealed
the accident had also caused three hip bone fractures and a dislocated hip.