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A 757 MAINTENANCE MANUAL S 215-100 CAUTION: MAKE SURE ALL THE BOOST PUMP AND OVERRIDE PUMP SWITCHES ARE _______ OFF. IF YOU OPERATE THE BOOST PUMPS OR OVERRIDE PUMPS FOR A LONG TIME, YOU CAN CAUSE DAMAGE TO THE PUMPS. (75) Make sure that all the fuel boost pump and fuel override pump switches are in the off position.
(76) Refuel the fuel tank if no more work is necessary (AMM 12-11-01/301).
G. Test the Engine Fuel Shutoff Valves
S 865-102 (1) Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P6 panel:
(a) 6E1, FUEL VALVES L SPAR
(b) 6E2, FUEL VALVES R SPAR
S 865-103 (2) Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
(a) 11D33, FUEL DISAGREE ENBL L
(b) 11D34, FUEL DISAGREE ENBL R
S 865-104 (3) Put the FUEL CONTROL switch on the P10 stand to the RICH-RUN position.
(4) Get access to the actuator on the left engine fuel shutoff valve through the access door 551BB.
(5) Make sure the manual override handle on the left engine fuel shutoff valve moves to the open position.
(6) Make sure the SPAR VALVE disagreement light comes on while the left engine fuel shutoff valve moves to the open position.
(7) Open these circuit breakers on the P6 panel and attach the DO-NOT-CLOSE tags:
(a) 6H1, FIRE EXTINGUISHING ENG L BTL 1
(b) 6H2, FIRE EXTINGUISHING ENG L BTL 2
(8) Pull the FIRE HANDLE for the left engine.
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A 757 MAINTENANCE MANUAL
S 215-111 (9) Make sure the manual override handle on the left engine fuel shutoff valve moves to the closed position.
(10) Make sure the SPAR VALVE disagreement light comes on while the left engine fuel shutoff valve moves to the closed position.
(11) Put the FIRE HANDLE for left engine to the NORMAL position. www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 3
