单选题

If the airplane experiences repeated failures of a pump at one location, there may be debris in the case drain line, case drain hose or case drain hose quick disconnect that cannot be flushed by accomplishing this procedure.

A如果飞机上某个泵出现重复故障，那么可以通过此程序将壳体回油管

B如果飞机上某个泵在一处出现故障，可以将壳体回油管，壳体回油软管或壳体回油软管快卸接头中的残渣清洗掉以完成此程序。

C如果飞机上某个泵在一处出现重复故障，说明在壳体回油管壳体回油软管或壳体回油软管快卸接头中存在无法通过此程序清洗干净的残渣。

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正确答案：A （备注：此答案有误）

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