Adam Air Flight 574 (KI574 or DHI574) was a scheduled domestic passenger flight operated by Adam Air between the Indonesian cities of Surabaya and Manado that crashed into the Makassar Strait near Polewali in Sulawesi on 1 January 2007. All 102 people on board died, making it the deadliest aviation accident involving a Boeing 737-400. A national investigation was launched into the disaster. The final report, released on 25 March 2008, concluded that the pilots lost control of the aircraft after they became preoccupied with troubleshooting the inertial navigation system and inadvertently disconnected the autopilot. Despite a series of safety incidents, which contributed to the shut down of Adam Air in June 2008, this was the only incident resulting in fatalities during the airline's 5-year existence. The crash is one of several transportation accidents, including the subsequent non-fatal crash of Flight 172, which resulted in the United States downgrading its safety rating of Indonesian aviation and led to large-scale transportation safety reforms in Indonesia. All Indonesian airlines were banned from flying into the European Union for several years after the crash. Adam Air was banned from flying by the Indonesian government in June 2008, and declared bankruptcy. History Aircraft The aircraft involved was a Boeing 737-4Q8 with serial number 24070, registration PK-KKW, which was manufactured in 1989. Prior to service with Adam Air, owned by International Lease Finance Corporation the aircraft had been leased to seven airlines: Dan-Air, British Airways, GB Airways, Transaero, WFBN, Air One and Jat Airways. The plane was equipped with 2 CFM56-3C1 engines, had around 50,000 hours flying, and was last evaluated and declared airworthy by the Indonesian transport ministry on 25 December 2005. It was due to be checked again in late January 2007. The Surabaya airport duty manager said that there were no technical problems with the aircraft prior to departure. Pilots The pilot-in-command was 47-year-old Captain Refri Agustian Widodo from Sidoarjo, Indonesia, who joined Adam Air in 2006. The first officer was 36-year-old Yoga Susanto from Magelang, an employee of Adam Air who also joined the company in 2006. Captain Widodo was a seasoned veteran, having logged more than 13,300 hours of flying time. As pilot-in-command of Boeing 737 aircraft, he had more than 3,800 hours of experience. First Officer Susanto had 4,200 total flying hours and he had almost 1,000 hours logged as a Boeing 737 first officer. Flight chronology On 1