Chemical foam dropped by firefighting planes failed to quell the flames, which leaped hundreds of meters ( yards ) above the plant.
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Firefighters shooting chemical foam have again smothered a fire that raged for nearly a week at Ivory Coast's main petroleum storage depot.
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The chemical foam extinguisher was invented in 1904 by Aleksandr Loran in Russia, based on his previous invention of fire fighting foam.
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As the flames died down, they doused it with chemical foam until it poured from the exits and ran down the charred fuselage.
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Chemical foam was unsuitable for use on polar solvents such as alcohol, as the fuel would mix with and break down the foam blanket.
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The firefighters had sprayed chemical foam to contain the fire, which began Thursday and had reduced two large petroleum storage tanks to molten metal.
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She said there was no need to use chemical foams as the oil patches had already thickened and they were able to be scooped up.
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Chemical foam is a stable solution of small bubbles containing carbon dioxide with lower density than oil or water, and exhibits persistence for covering flat surfaces.
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Firefighters battling a blaze at Ivory Coast's main petroleum storage depot had nearly exhausted chemical foam supplies Monday needed to smother the flames, a firefighting official said.
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As the flames died down, workers doused the plane with chemical foam until it poured from the exits and ran down the sides of the charred fuselage.
