If the pump is unserviceable, replace it.
答案解析
解析：
A. "If the pump is not suitable to be used, replace it." 这个选项的意思是如果水泵不适合使用，就应该替换它。
B. "If the pump is outmoded, replace it." 这个选项的意思是如果水泵过时了，就应该替换它。
C. "If the pump malfunctions, change the location for it." 这个选项的意思是如果水泵发生故障，就应该更换它的位置。
根据题干的意思，正确答案应该是A，因为题干是在讨论水泵无法使用的情况，而A选项是唯一提到水泵不适合使用的选项。
相关知识点：
泵不可用就更换
相关题目
The manufacturer shall provide an equipment list in this Section, in a separate document appended to the Pilot＇s Operating Handbook, or as a separate document. If the equipment list is not contained in this Section, state its location.
In addition to the weight and balance loading form, the manufacturer may provide a device to be used to calculate weight and balance. Instructions for its use shall be provided.
A weight and balance loading form and an explanation of the calculation procedure shall be provided.
This paragraph describes the procedures to calculate weight and moment for various phases of a planned flight and to ensure that the center of gravity is within approved limits.
Explain how to maintain this record when changes to the weight or moments of the airplane are made so that accurate starting data is available to calculate the weight and C.G. during normal operation of the airplane.
INSPECTION PROCEDURE sets forth the inspection procedure(s) to be utilized, such as magnetic particle, visual, etc, and may reference another document for the actual procedure, such as a nondestructive testing manual.
A review of test results applicable to the design was made. The loading conditions together with the resulting margins of safety were evaluated. The resulting data were used to determine if the component should be considered for incorporation into the CAP.
The effects of corrosion have not been considered in the rationale in selecting inspection times or in the effects on the fatigue stresses. It is very difficult to determine the effects of corrosion but, as the reports from the CAP inspections are received, the inspection times will be adjusted for any severe problems.
High-time airplanes, disassembled for major overhaul, were inspected to assist in selecting inspection items. Other high-time airplanes’ special Continuing Airworthiness Program Inspection results supplement these inspections.
In addition to understanding FAA Advisory Circulars AC 91-60 and AC 91-56, familiarity with GAMA Specification No.2, Manufacturers Maintenance Data and Air Transport Association of America Specification No.100, Specification for Manufacturers Technical Data, will aid in the preparation of a CAP for a specific airplane.
