1552.The noise suppressor reduces the noise generated by the exhaust gases.

A. 需要对特征或特点的补充描述,使数据更加完善。

B. 若有需要,对附加的特征或特性加以简明描述,可以使数据得到补充。

C. 若有需要,指标的额外特征或特性将是其原有基础描述上的补充。

A. APU start attempts are inhibited above 25,000 feet with both busses off,only one start attempt is allowed below 25000 feet.

B. With both busses power off,APU start attempts is recommended above 25000 feet and only one start could be accepted below 25,000 feet.

C. APU start attempts are notrecommended above 25,000 feet.With both busses off,only one startattempt is recommended below 25,000 feet."

A. Only the certified personnel can complete the modification or repair to the aircraft.

B. Pay attention that inspections or maintenance work ought to be carried out by mechanics.

C. Modifications or repairs to aircraft should be achieved by releasing staff.

A. Utilize an oil-free solution.

B. Use a solution with oil.

C. The oil is not used that contains a solution.

A. 消耗燃油包括用于发动机启动、拖动、起飞、正常爬升、下降和 45 分钟备用的燃油。

B. 用于发动机启动、拖动、起飞、慢速爬升、下降和 45 分钟使用的燃油,即为消耗燃油。

C. 所需燃油包括用于发动机启动、滑行、起飞、正常爬升、下降和 45 分钟备用的燃油。

A. Make sure that the mark on the bolt is aligned with the mark on the handle.

B. Make sure that the mark on the bolt is level with the mark on the handle.

C. Make sure that the mark on the bolt is parallel to the mark on the handle.

A. Keep all the parts that are serviceable and discard those that are broken.

B. Retain the parts that are functional and discard those that are of poor condition.

C. Keep all the parts that are operational and drop those that are contaminated.

A. 我们建议你不要在机库里执行此步骤。

B. 我们建议你不要在车间里执行此程序。

C. 我们推荐你不要在吊具上执行此过程。

A. 对于利用空气作为防冰介质的涡轮类动力装置,发动机防冰功能包含在空气系统中。

B. 因为涡轮类型动力组合使用气体作为防止积冰的渠道,发动机防积冰设备被储存在空气系统下。

C. 因为涡轮动力装置将空气用来防止积冰,发动机防冰包含在通风系统中。

A. The operation of new generation aircraft has adopted the operation method of damage tolerance.

B. The damage tolerance design method is applicable to the new type aircraft.

C. The design concept of damage tolerance was successfully applied to the design of new generation aircraft.