25、lf you install the upper drag strut incorrectly, it will hit the lower drag strut during retraction. 如果你不正确地安装上拖杆，它将在缩回过程中击中下拖杆

1455、The system test, which is self-contained and may duplicate other tests, contains all adjustments and tolerances tomaintain systems or units at maximum efficiency.

1454、According to the specification, handbooks shall be readily revisable.

1453、Only when both manufacturer and operator do their job can remain an entire fleet of airplanes continuously airworthy.

1452、A modular engine construction is used on all modern aircraft.

1451、机载辅助动力装置是那些装于飞机上的机载动力装置,用于产生和供应单一类型或辅助电力、液压、气动或其他动力的组合。

1450、All Supplements may be issued to all owners of the airplane model covered by the Handbook.

1449、Safety the clamp block across the control lever forks with safety。

1448、这是该类型紧固件的典型安装程序。

1447、Write only one instruction in each sentence unless two or more actions occur at the same time.

1446、解释当飞机的重量或力矩发生变化时,如何保持该记录,以便飞机在正常运行期间可以获得准确的起动数据来计算重量和重心。