Alternative Theories
British investigators and former French Concorde pilots looked at several other possibilities that the report ignored, including an unbalanced weight distribution in the fuel tanks and loose landing gear. They came to the conclusion that the Concorde veered off course on the runway, which reduced take-off speed below the crucial minimum. The aircraft had passed close to a Boeing 747 carrying French President Jacques Chirac who was returning from the 26th G8 summit meeting in Okinawa, Japan, which was much further down the runway than the Concorde's usual takeoff point; only then did it strike the metal strip from the DC-10.
The Concorde was overweight for the given conditions, with an excessively aft centre of gravity and taking off downwind. When it stood at the end of the runway, ready to roll, it was over its approved maximum takeoff weight for the given conditions.
The Concorde was missing the crucial spacer from the left main landing-gear beam that would have made for a snug-fitting pivot. This compromised the alignment of the landing gear and the wobbling beam and gears allowing three degrees of movement possible in any direction. The uneven load on the left leg's three remaining tyres skewed the landing gear, with the scuff marks of four tyres on the runway showing that the plane was veering to the left.
Read more about this topic: Air France Flight 4590
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