OIL SEPARATOR, A device used to separate unwanted 滑油分离器，

air from engine oil returning to a sump or oil tank. 一个能从回油槽或油箱发动机滑油中分离出不需要的

                                                  空气的装置。

OIL STRAINER, Type of oil filter.                 滑油筛，

                                                     滑油油滤的一种。

OLEO STRUT, SEE - SHOCK STRUT                     油液减震支柱，

                                                     见Shock Strut．

ONSIDE, Same side.                                同面，

                                                     相同的一面。

OMEGA NAVIGATION SYSTEM (ONS), A worldwide,       奥米加导航系统（ONS），

all weather navigation system.                       一个全球范围内全天候的导航系统。

OPEN CIRCUIT, An electrical circuit which is not  开路，

continuous from power supply to ground due to a break 由于线路中断或组件损坏而导致从电源到接地点之间

in the wiring or failure of a component.          不通的电路。

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英汉对照民用航空词典                                    BOEING

OPERATING EMPTY WEIGHT (OEW), The weight of          使用空重（OEW），

an airplane fully serviced, including the crew but without 一架勤务完毕的飞机，包括空勤人员，但不含燃油和业

fuel and payload.                                    载的重量。