shortly after. Despite his injuries, Warmerdam survived the plane crash. Loudoun County Sheriff's Office Deputy Charles Barton died in a hospital from injuries sustained while allowing other passengers to exit first. In addition to Captain Gannaway, seven passengers died as a result of the crash and subsequent fire, including three who died within 30 days of the crash, bringing the official death toll to eight. A ninth victim died four months after the crash from severe burn injuries. None of the passengers or crew escaped uninjured; eight had minor injuries. Among the seriously injured were Warmerdam and Fech. Many of the passengers suffered survivor guilt; some believed that they should have assisted other passengers. Surviving passenger Mary Jean Adair died of a heart attack eight weeks after the crash. She was included in a dedication to the people killed by the crash in a memorial service at an elementary school gymnasium some years later. Probable cause The probable cause of the accident was determined to be the failure of the propeller due to undiscovered metal fatigue in one blade resulting from corrosion from chlorine. Two previous failures of the same type of propeller had occurred, but those aircraft had been able to land safely. The failed propeller blade had undergone scheduled ultrasonic testing on May 19, 1994, which resulted in its rejection and removal from the propeller. The blade was sent to a Hamilton Standard facility, where it was subject to refurbishing work that was incorrectly performed. The propeller blade was then installed on the propeller fitted to the aircraft on September 30, 1994. The National Transportation Safety Board (NTSB) criticized Hamilton Standard, which had maintained the propellers, for "inadequate and ineffective corporate inspection and repair techniques, training, documentation, and communication", and both Hamilton and the Federal Aviation Administration for "failure to require recurrent on-wing ultrasonic inspections for the affected propellers". The overcast skies and low cloud ceiling at the crash site also contributed to the severity of the crash. Aftermath The Military Fraternal Organization of Pilots awarded Warmerdam its medallion for his role in the disaster after treatment for burns. As of 2021, Warmerdam is flying for Expressjet Airlines. In 2002, after an estimated 50 surgeries and lengthy therapy, he was able to resume flying for ASA. The American Society of Plastic Surgeons honored his positive attitude during the long recovery with one of their “Patients of Courage: Triumph