Side Cowl - Cover around the sides of the engine.

侧整流罩一发动机两侧的罩子。

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The thermal insulation prevents fire and engine operation heat damage to the composite inner wall of the fan duct cowl.

隔热毯可防止火焰和发动机 运行产生的热量对风扇函道内夹芯组件复合材料的损害。

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Nothing unusual was noted during the checks before the flight took off, but the cowl doors would have been "difficult to see unless crouched down so that the bottom of the engine is clearly visible".

BBC: London