been survivable, anyway. But a thorough test would have informed the FAA and Boeing that thrust reversers deploying in midair was such a dangerous occurrence that Boeing needed to install a positive lock that would prevent such an event." As a result of their findings during the investigation of Lauda Flight 004, additional safety features such as mechanical positive locks were mandated to prevent thrust reverser deployment in flight. Passengers and crew The passengers and crew included 83 Austrians: 74 passengers and nine crew members. Other nationalities included 52 Hong Kong residents, 39 Thai, 10 Italians, seven Swiss, six Chinese, four Germans, three Portuguese, three Taiwanese, three Yugoslavs, two Hungarians, two Filipinos, two Britons, three Americans (two passengers and the captain), one Australian, one Brazilian, one Pole, and one Iranian Turk girl who boarded the aircraft with a Turkish passport. Josef Thurner, the copilot, once flew as a co-pilot with Niki Lauda on a Lauda Boeing 767 service to Bangkok, a flight that was the subject of a Reader's Digest article in January 1990 that depicted the airline positively. Macarthur Job stated that Thurner was the better known of the crew members. Thomas J. Welch, the captain, lived in Vienna, but originated from Seattle, Washington. Notable victims include: Clemens August Andreae, an Austrian economics professor, was leading a group of students from the University of Innsbruck on a tour of the Far East. Pairat Decharin, the Governor of Chiang Mai province, and his wife. Charles S. Ahlgren, the former U.S. consul general to Chiang Mai, said "That accident not only took their lives and that of many of Chiang Mai's leaders, but dealt a blow to many development and planning activities in the town." Aftermath About a quarter of the airline's carrying capacity was destroyed as a result of the crash. Following the crash of OE-LAV, the airline had no flights to Sydney, on 1, 6, and 7 June. Flights resumed with another 767 on 13 June. Niki Lauda said that the crash in 1991 and the period after was the worst time in his life, even worse than the recovery from his injuries after his crash in the 1976 German Grand Prix. After the crash, bookings from Hong Kong decreased by 20% but additional passengers from Vienna began booking flights, so there were no significant changes in overall bookings. In early August 1991, Boeing issued an alert to airlines