89.  Monitoring and redundancy within the flight control system, aircraft sensors, power and hydraulic generation ensure a high degree of availability of the electrical control.飛行操縱系統的監控和冗余、飛機傳感器、動力和液壓的產生，這些構成了高度有效性的電傳操縱。

90.  NOTE : Make sure that the check valve is installed and that it is in the correct position.注意：確保單向活門已經安裝，并且位置正確。

91.  NOTE : The end of the sleeve (2) must be within the colored markings painted on the cabin recirculation fan (15).注意：襯套(2)的末端必須在客艙再循環風扇(15)的涂色標記范圍內。

92.  OBEY AIRLINE POLICY AND LOCAL HEALTH DEPARTMENT AND LAW ENFORCEMENT REGULATIONS FOR DISPOSAL OF INFECTIOUS MATERIALS.對于傳染性材料處理要遵從航空公司政策、地方衛生

部門和法律強制性規定。

93.  OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THIS/THESE MATERIAL/S.USE PROTECTIVE CLOTHING, RUBBER GLOVES AND GOGGLES.使用這些材料時，遵守廠家說明。穿上防護衣，戴上橡膠手套和護目鏡。

94.  ON COMPLETION OF THE CLEANING STEPS, PARTS SHALL BE PROTECTED BY MEANS OF PROTECTIVE CAPS OR APPROPRIATE PACKAGING MATERIAL在整個清潔過程中，部件應該用防護堵蓋或合適的密封材料進行防護。

95.  On overhead panel, check that IRU mode selector switch is OFF position. As required install covers on each pitot probes.在頭頂板上，檢查 IRU模式開關在 OFF位。視需安裝皮托管套。

96.  On the HP and the LP ground connector put a warning notice in position to tell persons not to supply the ground air.在“高壓”和“低壓”地面接頭上放置警告標牌以告知他人不要提供地面氣源。

97.  On the MCDU, push the line key adjacent to the RETURN indication until the CFDS menu page comes into view.在 MCDU上，按壓與 RETURN相鄰的行選鍵，直到 CFDS菜單頁顯示出來。

98.  On the overhead panel 40VU, make sure that the YELLOW/ENG 2 PUMP P/BSW is set to on. (FAULT and OFF lights are out).頭頂面板 40VU，確保 theYELLOW/ENG 2 PUMP開關設置在 ON位（FAULT和 OFF燈滅）