![]() ![]() The false parameters entered in the FMS and used for the take-off were the result of a performance calculation based on a mass of 100 tons less than the real mass of the aircraft. The final report concludes the probable causes of the serious incident were: The overflight at low height of the runway end during takeoff was the result of a take-off undertaken with erroneous parameters (low take-off speeds, flap setting and insufficient thrust). Aviators operating internationally are required to read/speak English besides their local language, investigators need to be able to read/write/speak English to communicate with their counterparts all around the globe). On Dec 21st 2018 the BEA released their final report in French only (Editorial note: to serve the purpose of global prevention of the repeat of causes leading to an occurrence an additional timely release of all occurrence reports in the only world spanning aviation language English would be necessary, a French only release does not achieve this purpose as set by ICAO annex 13 and just forces many aviators to waste much more time and effort each in trying to understand the circumstances leading to the occurrence. The BEA rated the occurrence a serious incident and opened an investigation. During rotation for takeoff the crew noticed the aircraft did not become airborne, firewalled the engines, established maximum pitch possible without tail strike, lifted off, climbed out to safety and continued to destination. ![]() On Jun 2nd 2015 the French BEA reported in their weekly bulletin, that the crew used 243 tons of takeoff weight instead of 343 tons for computation of their takeoff performance, the resulting speeds were input into the flight management system. The crew spontaneously declared this event by ASR (Air Safety Report) and informed their superiors." The French BEA was informed. The aircraft took off normally and the flight continued to its destination. The crew, who noticed this slow acceleration, immediately reacted by applying full thrust. The airline reported: "Air France confirms that a data insertion error on take-off of cargo flight AF6724 operated by a Boeing 777 F from Paris-Charles de Gaulle to Mexico on led to insufficient acceleration at the beginning of take-off. ![]() The aircraft took off without further incident, the crew discovered their takeoff weight had been programmed 100 tons below actual takeoff weight resulting in incorrect takeoff power and reference speed computations, and completed a safe landing in Mexico City about 11:15 hours later. An Air France Boeing 777-200 freighter, registration F-GUOC performing freight flight AF-6724 from Paris Charles de Gaulle (France) to Mexico City (Mexico), was accelerating for a balanced takeoff from Charles de Gaulle Airport's runway 26R when the crew detected the aircraft wasn't accelerating quickly enough and firewalled the engines. ![]()
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