These conditions, if not corrected, could result in damage to critical systems and structures, and the potential for fire in the electrical compartment.

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The fire broke out in the avionics compartment of an empty Dreamliner shortly after it had arrived and passengers had disembarked.

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Just before take-off, fire ants emerged from an overhead compartment.

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The area of origin for the fire was determined to be outside the engine compartment.

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Richard Walsh, a Massport spokesman, said the jet's auxiliary power unit battery, which is housed in a small compartment known as the aft electrical equipment bay, exploded after crews believed the fire was extinguished.

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