An intense fire erupted in the no. 1 engine while the aircraft was on a flight from Tangiers to Madrid. At 18:03 the crew contacted Paracuellos Area Control Centre asking for emergency entry clearance. A little later the no. 1 engine was seen falling from the plane. The aircraft lost height rapidly and crashed. PROBABLE CAUSE: “A fire produced by extraneous objects, which developed in the left nacelle. A different type of fire would have burned the wheel, the magneto couplings and the landing gear leg; fuel combustion alone would not have been sufficient to weaken so rapidly the engine support fittings.”