Lesson Two 课后阅读理解-1 Passage 1 Read the following passage and choose the best answer from A B C D Fire on Board Fire on board is one of the most hazardous situations that a flight crew can be faced with. Without aggressive intervention by the flight crew, a fire on board an aircraft can lead to the catastrophic loss of that aircraft within a very short space of time. Smoke and fumes from an in-flight fire are likely to be highly toxic and irritating to the eyes and respiratory system. Smoke and fumes may therefore quickly incapacitate the crew unless they take protective action. In addition, heat from fires will affect aircraft systems and ultimately affect the structural integrity of the aircraft both of which will lead to loss of control. An engine fire is normally detected and contained satisfactorily by the aircraft fire detection and suppression systems. However, in certain circumstances (e.g. an explosive breakup of the turbine), the nature of the fire is such that onboard systems may not be able to contain the fire and it may spread to the wing and/or fuselage. Where an engine fire has been successfully contained, there is still a risk that the fire may reignite and therefore it is still advisable for the crew to land the aircraft as soon as possible and allow fire crews to carry out a visual examination of the engine. A fire within the cabin will usually be detected early and be contained by the crew using onboard fire fighting equipment. As with an engine fire, it is still advisable to land the aircraft as soon as possible and carry out a detailed examination of the cause of the fire and any damage. A hidden fire may be detected by onboard fire detection systems or by the crew or passengers noticing smoke or fumes, a hot spot on a wall or floor, or by unusual electrical malfunctions particularly when the systems are unrelated. In case of fire on board, the ATC should inform supervisor, ask for dangerous goods on board and POB, inform landing airport, clear runway when the aircraft is 25 nautical miles on final, keep safety strip clear, and the light system 100% so as to assist resolution of this situation. (355 words)