1230.Carefully put the valve assembly in its position and install the spacers and the bolts.

A. 如果因出现腐蚀而不得不拆除螺栓,则涂抹润滑油。

B. 如果因腐蚀而不能拆卸螺栓,则涂抹渗透润滑油。

C. 出现腐蚀时不可以拆卸螺栓,需要先涂抹防蚀剂。

A. When simulating altitude,make sure you have alternate ATC transponders in active mode.

B. Make sure that the ATC transponders are in standby mode when you simulate altitude.

C. It is optional to keep the ATC transponders in ready mode during altitude simulation.

A. Visual difference is acceptable between the previous surface and the new surface.

B. There should be no visual difference between the initial surface finish and the new surface finish.

C. It is forbidden to have acoustic difference between the former surface finish and the new surface finish.

A. Record the test results.

B. Record the check results.

C. Test the result on the record.

A. When the crossfeed system is open,it is possible for one fuel pump to supply fuel to the two engines.

B. When the supplying system is open,it is possible for one fuel pump to supply fuel to the two engines.

C. One fuel pump can supply fuel to two engines,as the supplying system is open.

A. 不允许通过扭转螺母将紧固件拉入孔内。

B. 在拧紧紧固件的时候要保持螺母不转动。

C. 拧紧紧固件与孔对齐,固定住螺母不要转动。

A. After wash aircraft,all 3 landing gears were found un-lubricated.

B. After aircraft wash,all 3 landing gears were found un-lubricated.

C. After aircraft clean,all 3 landing gears was found un-lubricated.

A. 开口式刮油环的安装属于临时修理,需要在前起落架拆下时更换来做其他的维修。

B. 开口式刮油环的安装属于临时修理,在前起落架拆下做其他的维修或者大修的时候,需要被更换。

C. 开口式刮油环的安装属于临时修理,在前起落架拆下做其他的维修或者定检的时候,需要被定期修理。

D. C.开口式刮油环的安装属于临时修理,在前起落架拆下做其他的维修或者定检的时候,需

E. C.开口式刮油环的安装属于临时修理,在前起落架拆下做其他的维修或者定检的时候,需要被定期修理。

A. Make sure that chemical compound are not near the engine nozzle.

B. Make sure that solvents are not near the engine exhaust.

C. Make sure that there's no isopropyl alcohol near the engine exhaust port.

A. Setting cable tension,flight control surfaces travel limitsand stops are the main tasks of rigging.

B. Cable tension set,flight controls travel limits adjustment and travel stops set are the rigging procedures.

C. Rigging involves setting cable tension,adjusting travel limits of flight controls,and setting travel stops.