131. Connect the towing arm to the nose gear

A. Pressurization of the pneumatic crossover manifold and use of an external air source connected to the air charging valve manifold to pressurize the reservoirs for ground maintenance is the second method.

B. You can use the second method to pressurize crossover manifold and use an external air source connected to the air charging valve manifold to pressurize the reservoirs for ground maintenance.

C. The second method is that it is not necessary to pressurize the pneumatic crossover manifold but to use an external air source connected to the air charging valve manifold to pressurize the reservoirs for ground maintenance.

A. Those units and components which furnish a means of pressurizing, heating, cooling, moisture controlling, strainer and treating the air used to ventilate the areas of the fuselage within the pressure seals, as applicable.

B. Those units and components which furnish meaning pressurizing, heating, cooling, moisture control, filter and treating the air used to ventilate the areas of the fuselage within the pressure seals, as applicable.

C. Those units and components which furnish a means of pressurizing, heating, cooling, moisture controlling, filtering and treating the air used to ventilate the areas of the fuselage within the pressure seals, as applicable.

A. 可以通过拆下保护盖来接近机械装置

B. 重新安装保护盖来接近机械装置

C. 拆下保护盖来获得机器

A. This program is not reasonable now.

B. This procedure is not applicable at this time.

C. This program is not available at present.

A. If a single power source serves more than three systems, it will be discussed in one of the three systems.

B. If a single power source serves two or more systems, it needs to be discussed under either one system under appropriate chapter heading.

C. If a single power source serves two or more systems, each system should discuss it under appropriate chapter heading.

A. Each of the two life vests located at L2 entry door flight crew station is damaged.

B. Each of the two life vests located at L2 entry door flight crew station is out of time limit.

C. Each of the two life vests located at L2 entry door flight crew station is out of service.

A. 滚轮上没有过多的磨损且襟翼轨道上没有腐蚀迹象

B. 滚轮上没有过多的磨损且襟翼轨道上没有划痕迹象

C. 滚轮上没有过多的磨损且襟翼轨道上没有凹痕迹象

A. Apply fuel to the steel surfaces.

B. Apply oil to the alloy surfaces.

C. Apply oil to the steel surfaces

A. The presence of water in fuel is dangerous.

B. The incidence of water in fuel is dangerous.

C. Water in the fuel is dangerous.

A. 如果固态样品中有金属屑,更换液压泵。

B. 如果固态样品中有金属屑,更换液压活门。

C. 如果液态样品中有金属屑,更换液压泵。