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Investigators Say Boeing 737-800 Experienced 'Serious' Throttle Fault During Takeoff. 'The Independent' reports that a recent Tui flight departing from Bristol Airport only cleared the A38 road by 100 feet. According to air accident investigators, the March 4 incident was due to a fault with the throttle system of the Boeing 737-800. This fault involved the jet's auto-throttles, resulting in the aircraft not having sufficient thrust during takeoff. "The aircraft took off… with a thrust setting significantly below that required to achieve the correct takeoff performance." The pilots of the Tui flight were reportedly unaware of the issue, despite passing over the busy A38 well below the aircraft's intended height. On May 30, the Air Accidents Investigative Branch (AAIB) issued a special bulletin stating that the agency is looking into the matter, while also investigating how pilots missed a routine check. "Despite a… requirement to check the thrust setting on takeoff, the crew did not realize that the thrust was not set correctly until after the takeoff although they had noted how close to the end of the runway they were." "The investigation continues to examine all pertinent factors associated with this serious incident and a final report will be issued in due course.", AAIB statement, via 'The Independent'. According to Boeing, the original auto-throttle system on the 737-800s has , “a long history of nuisance disconnects during takeoff mode”. The AAIB said that a newer version has been available since 2021, however it was not a mandatory update and had not been installed on the aircraft involved in the incident. THIS VIDEO MUST NOT BE EDITED FOR LENGTH TO COMBINE WITH OTHER CONTENT