二、TEXT
(1) three separate and independent hydraulic system are provided to power the flight controls, landing gear, and thrust reversers. System A and system B are full-time operating system during flight that share rsesponsibility for all hydraulically powered components. The standby system is operated only on demand.

三個分隔獨立的液壓系統用以為飛行控制、起落架和反推裝置提供動力。 A系統和 B系統在飛行中為全時操作系統，共同負責對所有受液壓動力控制的組件進行控制。備用系統只在需要時工作。

(2) System A draulic power operates the following systems: Landing gear Nose wheel steering

Left thrust reverser
Ailerons – power control unit and autopilot actuator
Elevators – power control unit and autopilot actuator.
Elevator feel
Rudder
Inboard flight spoilers 3 and 6
Cround spoilers.
Alternate brakes.
Power transfer unit.

A系統為下列系統提供動力：
起落架
前輪轉彎系統
左反推裝置
副翼—動力控制組件及自動駕駛作動筒
升降舵—動力控制組件及自動駕駛作動筒
升降舵 FEEL
方向舵
內側飛行擾流板 3#及 6#
地面擾流板
備用剎車
動力傳輸組件

(3) System A pressure is provided by one engine driven pump(EDP) and one electric motor driven pump（EMDP). A 28v dc motor operated shutoff valve in the supply line between the reservoir and the engine driven pump is normally open . this valve is closed and stops the flow of hydraulic fluid to the engine when the fire handle is pulled.
A系統壓力由一個發動機驅動泵和一個電動免馬達驅動泵提供。一個 28v直流免達操作位于油箱及發動機驅動泵之間傳送管內的截流閥，正常情況下，它是打開的。當火警手柄拉上時，閥門關閉并停止壓力流向發動機。
(4) Normal system configuration is with both pumps operating to output fluid pressurized to 3000 psi through the pressure module to the using system. The pressure module contains pressure filter, low pressure switches, check valves and a pressure relief valve. Cooling and lubricating fluid from the pumps is filtered and routed through a heat exchanger in the number one fuel tank before entering the reservoir. Return fluid from the suing systems is filtered at the return module before entering the reservoir.

系統正常構造是通過操作泵輸出 3000PSI的壓力，通過壓力組件給用戶系統。壓力組件包括壓力油濾，低壓開關，單向活門和一個壓力釋放活門。

(5) Hydraulic system B provides fluid under pressure of 3000 psi to portions of the flight control, landing gear, and thrust reverser systems. System B hydraulic power operates the following system: Main wheel brakes Right thrust reverser Ailerons – power control unit and autopilot actuator. Elevators – power control unit and autopilot actuator. Elevator feel Rudder Outboard flight spoiler 2 and 7 Trailing edge flaps Leading edge flaps and slats Alternate landing gear retraction Alternate nose wheel steering