757 AMM 飞机维护手册 仪表 CHAPTER 31 - INSTRUMENTS 2(65)

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 NOTE: During usual operation, the inner and outer BRT
____ controls are connected together and rotate together.
 b)  Make sure that the light intensity of the bottom
 display increases. c) Turn the inner BRT control in a clockwise direction. d) Make sure that the light intensity of the top display
 increases.
 S 725-032
 (4)  EICAS Connections Test
 (a)  Make sure that these circuit breakers on the P11 panel are closed: 1) 11D23, ENGINE STBY IND 1 OR ENGINE STBY IND 2) 11D24, ENGINE STBY IND 2, IF APPLICABLE
 CAUTION: OPEN THE LEFT AND RIGHT ENGINE FIRE EXTINGUISHING BOTTLE
_______ CIRCUIT BREAKERS. THE FIRE EXTINGUISHING BOTTLES WILL OPERATE ACCIDENTALLY IF THESE CIRCUIT BREAKERS ARE CLOSED.
 (b)  Open these circuit breakers on the main power distribution panel, P6, and install DO-NOT-CLOSE tags: 1) 6H1, FIRE EXTINGUISHING ENG L BTL 1 2) 6H2, FIRE EXTINGUISHING ENG L BTL 2 3) 6H3, FIRE EXTINGUISHING ENG R BTL 1 4) 6H4, FIRE EXTINGUISHING ENG R BTL 2
  ú

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MAINTENANCE MANUAL

 (c)  
Make sure that the ENG START switches on panel P5 are in the OFF position.

 (d)  
Install DO-NOT-OPERATE tags on the ENG START switches.

 (e)  
Make sure that the four fuel boost pump switches and the two fuel override pump switches on panel P5 are OFF.

 (f)  
Make sure that these circuit breakers on the P6 panel are closed: 1) 6C1, FUEL COND CONT L 2) 6C2, FUEL COND CONT R 3) 6E1, FUEL VALVES L SPAR 4) 6E2, FUEL VALVES R SPAR

 (g)  
Make sure that both of the left and right fuel control switches on the control stand, panel P10, are in the CUTOFF position.

 WARNING: OPEN THESE CIRCUIT BREAKERS ON THE OVERHEAD CIRCUIT
_______ BREAKER PANEL, P11, AND THE MAIN POWER DISTRIBUTION PANEL, P6. AN ENGINE FUEL LEAK CAN OCCUR WHICH CAN CAUSE INJURY OR DAMAGE IF THESE CIRCUIT BREAKERS ARE CLOSED.
 (h)  
Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags: 1) 11D7, ENGINES STBY IGNITION LEFT 1 2) 11D8, ENGINES STBY IGNITION LEFT 2 3) 11D9, ENGINES STYB IGNITION RIGHT 1 4) 11D10, ENGINES STBY IGNITION RIGHT 2 5) 11L1, LEFT ENGINE IGN 1 6) 11L28, RIGHT ENGINE IGN 1

 (i)  
Open these circuit breakers on the P6 panel and attach DO-NOT-CLOSE tags: 1) 6F14, L FUEL OVRD PUMP 2) 6F20, R FUEL OVRD PUMP 3) 6H14, L AFT FUEL BOOST PUMP 4) 6H17, R FWD FUEL BOOST PUMP 5) 6H20, R AFT FUEL BOOST PUMP 6) 6H23, L FWD FUEL BOOST PUMP

 (j)  
Make sure that the left and right ENG VALVE and SPAR VALVE lights are off.

 (k)  
Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags: 1) 11J29, EICAS CMPTR RIGHT 2) 11J31, EICAS DISPLAY SW 3) 11K9, LEFT ENG OIL PRESS 4) 11K35, RIGHT ENG OIL PRESS
　
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