41.  DO NOT PUT FINGERS ON CIRCUITS OF ELECTRONIC BOARDS. STATIC DISCHARGES CAN DAMAGE THE COMPONENTS.不要将手指放在电路板的电路上。静电放电会损坏部件；

42.  DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE

MAINTENANCE TASK(S).进行维护时，在 APU装置冷下来前不要接触它，以避免灼伤。

43.  Do the electrical bonding of electrical connectors and of the components. Use conductive bolts and screws and bonding straps in the fuselage and in the wings.进行电气插头的电气搭接和部件的电气搭接。在机身和大翼使用导电的螺栓、螺钉和搭接线。

44.  DURING ALL THE HANDLING OF SENSITIVE PARTS, STRICTLY TAKE THE FOLLOWING IMPERATIVE PRECAUTIONS:在处理敏感元件的全过程中，要严格遵守以下强制性的预防措施：

45.  During flight the L/G is retracted into the landing gear bays in the belly of the aircraft. When the L/G is extended or retracted the related doors close to make the aerodynamic contours of the aircraft.飞行期间，起落架收进机腹部分的起落架舱。当起落架伸出或收进，相关的门关闭，保证飞机的气动外形。

46.  During this 15 minutes period you must constantly monitor the duct inlet and the pack temperatures.在 15分钟时间期间内你要持续监控管道出口和 pack（空调组件）温度。

47.  Each troubleshooting chart allows diagnosis down to at least board level and sub-routines are included for any necessary adjustment or specific tests. After fault rectification reference is made back to the appropriate test.每个排故流程图,允许故障诊断至少到电路板级,并为任何必要的调节和特殊测试提供子程序.在故障被校正之后,测试参照系要回到相关的测试步骤.

48.  ELEVATOR, A hinged moveable part on the trailing edge of the horizontal stabilizer for airplane pitch (nose up and nose down) control.升降舵，铰连在水平安定面后缘上的可动部件。用以操纵飞机的俯仰运动（机头朝上及朝下）。

49.  ENGINE PRESSURE RATIO (EPR), The ratio of inlet pressure over exhaust-let pressure measurements. The ratio is used as the primary parameter to set thrust on some engines.发动机压力比 (EPR），进气压力与排气压力值的比，某些发动机以此作为设定推力的主要依据。