1.   And this problem did not originate in the center tank, but in the wing tanks.

2.   Airbus jets have air conditioning packs under the center wing tank, but the design incorporates a ventilation system that cools the heated air given off by the units.

3.   He said the aluminum sides of the tank were likely incinerated in the inferno caused by the fuel pouring from the ruptured wing tanks.

4.   National Transportation Safety Board investigators have said that they believe a mechanical flaw caused an explosion in the center wing tank, which was nearly empty.

5.   Some carriers could simply seal up their center tanks and use only the wing tanks.

6.   The manifold is a fuel line that runs through the center fuel tank and connects the wing tanks on either side.

7.   The nose-down approach forced the remaining fuel to the leading edge of the wing tanks, where the fuel lines fed the engines.

8.   The plane carried thousands of gallons of fuel in its wing tanks.

9.   The plane had plenty of fuel in its two wing tanks to get to Paris.

10.   The wiring problem emerged in April, when mechanics at Continental Airlines were called out to repair a fuel leak in a wing tank.