219.A system is a combination of interrelated components arranged to perform a specific function.

A. Information on specific optional systems or equipment may be included in this section or in Section 9,Supplementary.

B. Information about noncompulsory systems or equipment may be included in this section or in Section 9,Supplements.

C. Information on specific optional systems or equipment may be included in this Section or in Section 9,Supplements.

A. 英语通常不是技术资料读者的母语。

B. 英语通常不是技术资料编写者常用语言。

C. 英语通常不是技术资料修订者的本地语言。

A. 你可以对这些条款使用备用替换。

B. 你可以对这些条款使用不同的替代。

C. 你可以对这些条款使用等效的替代。

A. The space equipment releases the air from the compound.

B. The vacuum equipment decreases the air from the compound.

C. The vacuum equipment removes the air from the compound.

A. The system is pneumatically operated and mechanically controlled.

B. Hydraulic power drives the system,while electricity is connected.

C. The system is hydraulically operated and electrically controlled.

A. 有些功能不存在。

B. 有些功能不可用。

C. 有些系统不可用。

A. The CAP is notintended to change or replace any portion of the applicable Airplane Maintenance Manual or Service Letters.

B. The CAP is developed to change or place some part of the applicable Airplane Maintenance Manual or Service Letters.

C. Revising or replacing any part of the serviceable Airplane Maintenance Manual or Service Bulletin is not the main purpose of the CAP.

A. Because pressurized air can blow contamination away from the display unit,you should not use it to clean the holes behind the display unit in order to avoid damaging the equipment.

B. Do not use compressed air to clean the holes on the rear of the display unit.Compressed air will push contamination into the display unit.This can cause damage to the equipment.

C. Do not use compressed air to clean the holes behind the display unit,because it can blow contaminants into display unit which may be damaged.

A. Give precise instructions for using emergency exits.

B. Give special directions for using urgent exits.

C. Give accurate data for using urgent exits.

A. Timely check the instruments for accuracy.

B. Instuments shuld be periodically checked for accuracy.

C. Timely check the instruments if it is accurate.