The air portion includes units from the scoop inlet to the vapor vent return, and the impeller chamber.

A. Get a sample of hydraulic fluid.

B. Scavenge the hydraulic fluid.

C. Service the hydraulic reservoirs.

A. 确保流经管路的液体没有气泡。

B. 确保管路渗漏出的油液没有气泡。

C. 确保液压油通过管路，且没有产生气泡。

A. When the required maintenance procedure is not very long and fairly simple, the above combination can be grouped under a title which is called maintenance practice.

B. When the required maintenance procedure is not lengthy and is relatively simple, a combination of the above may be grouped under one heading and called maintenance practices.

C. When the required maintenance procedures are not very long and comparatively simple, the above combinations can be bound under one subject, calling maintenance practices.

A. 本程序指出，在飞机进行任何改装之前，应联系美国联邦航空局，以确保不违反飞机的适航性。

B. 本程序指出，在飞机进行任何改装之前，美国联邦航空局应与厂家确认其不违反飞机的适航性。

C. 本程序指出，在飞机进行任何改装之初，应联系美国联邦航空局，以确保飞机的适航性。

A. Programs shall be written in order of the reference number of each chapter and own proper primary and secondary theme headings. It is not necessary to begin a program from the ceiling of a new page.

B. Procedures shall be sorted in priority order of the reference number in each chapter. They have appropriate main and subordinate topic headings and the beginning do not need to exceed the top of a new page.

C. Procedures shall be prepared in reference number sequence within each chapter with proper major and minor subject heads, without the necessity of each procedure starting at the top of a new page.

A. The filter must be replaced before putting new oil in the system.

B. The replacement of the filter is optional before refueling the system.

C. The filter can not be replaced unless you put new oil in the system.

A. Too much force can cause damage to the sealing components.

B. Excessive force may damage the seal.

C. Too much force can cause damage to the contact surface.

A. Lubricate the engine and its accessories with the same brand.

B. Lubricants for the engine and the auxiliary equipment are the same.

C. The engine and the additional devices are greased in a same manner.

A. 然而，“紧急情况”几乎总是涉及需要立即快速响应的故障，例如总动力装置故障、火警或烟雾或客舱快速失压。

B. 然而，“紧急程序”几乎总是波及到需要立即和快速反应的故障，例如发动机故障、火灾或烟雾，以及机舱快速释压等。

C. 然而，全动力装置故障、火警烟雾或座舱快速失压，这些几乎总是涉及需要立即快速响应的故障属于“应急状况”。

A. 微处理器卡可以更换。

B. 微处理器卡可以互换。

C. 微处理器卡可以改变。