(2)
 De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).

 (3)
 Reactivate the thrust reverser system (Ref. TASK 78-30-00-440-040).

 1EFF : ALL 1 28-20-00Page 407 1 1 Nov 01/04 1 1 1CES 1 Subtask 28-20-00-942-050

 D. Removal of Equipment
 (1)
 Remove the ground support and maintenance equipment, the special and standard tools and all other items.

 (2)
 Remove the access platform(s).

 (3)
 Remove the warning notice(s).

 1EFF : ALL 1 28-20-00Page 408 1 1 Nov 01/04 1 1 1CES 1 MAIN FUEL PUMP SYSTEM - DESCRIPTION AND OPERATION

_________________________________________________
 1. General
_______

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 The main fuel pump system supplies the fuel from the fuel tanks to the engines. The system has six main fuel pumps (main pumps):
 -
two in each wing tank

 -
two in the center tank. The main pumps in each wing operate together continuously to supply fuel to their related engine. The Fuel Level Sensing Control Units (FLSCUs) (Ref. 28-46-00) normally control the main pumps in the center tank automatically. They supply fuel to their related engine during flight when the fuel in the wing tank is below a specified level. The wing tank pumps each have a sequence valve that makes sure the center tank fuel is supplied to the engines first.

 **ON A/C 301-399,
 The main fuel pump system supplies the fuel from the wing tanks to the engines. The system has four main fuel pumps (main pumps), two in each wing. The main pumps in each wing operate together to supply fuel to their related engine.
 **ON A/C ALL
 The crossfeed system (Ref. 28-23-00), when closed, divides the main fuel pump system into two parts, one part for each engine. If one wing tank main pump has a failure (or it is set to OFF) the other will continue to supply fuel to its related engine. When the crossfeed system is open, it is possible for one fuel pump to supply fuel to the two engines.
 The system has valves that automatically bleed the air from the engine feed-pipes during fuel pump operation.
 The Engine/Warning Display (EWD) (Ref. 31-66-00) and the System Display (SD) (which together make the ECAM) give system data to the crew. If specified failures occur:
 -a warning is given on the EWD

 -the FUEL page shows on the SD.
 When necessary the crew can make a selection on the ECAM control panel (Ref.
 31-56-00) to look at the FUEL page.

 1EFF : ALL 1 28-21-00Page 1 1 1 Aug 01/05 1 1 1CES 1

 2. Component Location
__________________

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 (Ref. Fig. 001)
 **ON A/C 301-399,
 (Ref. Fig. 001A)

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 (Ref. Fig. 002)
 -------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF.
 -------------------------------------------------------------------------------1QM CANISTER-FUEL PUMP, L WING TK OUTR 540 540AB 28-21-52 3QM CANISTER-FUEL PUMP, R WING TK INR 640 640AB 28-21-52 2QM CANISTER-FUEL PUMP, L WING TK INR 540 540AB 28-21-52 4QM CANISTER-FUEL PUMP, R WING TANK 640 640AB 28-21-52
 OUTER 5QM STRAINER-PUMP INLET, L WING TK OUTR 540 540AB 28-21-54 7QM STRAINER-PUMP INLET, R WING TK INR 640 640AB 28-21-54 6QM STRAINER-PUMP INLET, L WING TK INR 540 540AB 28-21-54 8QM STRAINER-PUMP INLET, R WING TK OUTR 640 640AB 28-21-54
 21QA PUMP-FUEL NO 1, L WING TK 540 540AB 28-21-51 22QA PUMP-FUEL NO 1, R WING TK 640 640AB 28-21-51 25QA PUMP-FUEL NO 2, L WING TK 540 540AB 28-21-51 26QA PUMP-FUEL NO 2, R WING TK 640 640AB 28-21-51 23QA PRESS SW-FUEL PUMP NO 1, L WING TK 571 734 28-21-15 24QA PRESS SW-FUEL PUMP NO 1, R WING TK 671 744 28-21-15 27QA PRESS SW-FUEL PUMP NO 2, L WING TK 571 734 28-21-15 28QA PRESS SW-FUEL PUMP NO 2, R WING TK 671 744 28-21-15 33QM CHECK VALVE-FUEL PUMP, L WING TK 540 540AB 28-21-43
 OUTR 34QM CHECK VALVE-FUEL PUMP, L WING TK INR 540 540AB 28-21-43 35QM CHECK VALVE-FUEL PUMP, R WING TK INR 640 640AB 28-21-43 36QM CHECK VALVE-FUEL PUMP, R WING TK 640 640AB 28-21-43
 OUTR 37QM CHECK VALVE-FUEL PUMP, L VENT SURGE 540 540RB 28-21-43 TK
 1EFF : ALL 1 28-21-00Page 2 1 1 Aug 01/05 1 1 1CES 1

 -------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF. -------------------------------------------------------------------------------
　
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