Subtask 28-22-52-420-050
A. Installation of the APU Fuel Pump Canister
(1)
Remove the blanking plugs from the disconnected line ends.
(2)
Apply FUELS (Material No. 01-001) on the new O-rings (9), (21) and (23).
(3)
Install the O-ring (23) on the pump canister (22).
(4)
Install the O-ring (9) on the pump canister (22).
(5)
Install the pump canister (22) on the rear spar (1).
(6)
Install the gutter (7), the new washers (6) and the five screws (5).
(7)
Tighten the five screws (5) and safety with lockwire 0.8 mm.
(8)
Connect the bonding strip (3) and install the bolt (4) and the nut (2).
(9)
Install the O-ring (21) between the line (20) and the pump canister (22).
(10)
Install the washers (19) and the screws (18).
(11)
Make sure that the O-ring (9) is correctly installed between the pump canister (22) and the line (12).
(12)
Install the washers (10) and the screws (11).
(13)
Install the line (17) and tighten the nuts (8).
(14)
Connect the bonding strip (15) and install the washer (14), the bolt
(13) and the nut (16).
(15)
Install the APU fuel pump 4QC (Ref. TASK 28-22-51-400-001).
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Subtask 28-22-52-420-050-A
A. Installation of the APU Fuel Pump Canister
(1)
Remove the blanking plugs from the disconnected line ends.
(2)
Apply FUELS (Material No. 01-001) on the new O-rings (9), (21) and (23).
(3)
Install the O-ring (23) on the pump canister (22).
(4)
Install the O-ring (9) on the pump canister (22).
(5)
Install the pump canister (22) on the rear spar (1).
(6)
Install the bonding lug (7), the new washers (6) and the five screws (5).
(7)
Tighten the five screws (5) and safety with lockwire 0.8 mm.
(8)
Connect the bonding strip (3) and install the bolt (4) and the nut (2).
(9)
Install the O-ring (21) between the line (20) and the pump canister (22).
(10)
Install the washers (19) and the screws (18).
(11)
Make sure that the O-ring (9) is correctly installed between the pump canister (22) and the line (12).
(12)
Install the washers (10) and the screws (11).
(13)
Install the line (17) and tighten the nuts (8).
(14)
Connect the bonding strip (15) and install the washer (14), the bolt
(13) and the nut (16).
(15)
Install the APU fuel pump 4QC (Ref. TASK 28-22-51-400-001).
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Subtask 28-22-52-710-050
B. Do the operational test of the APU fuel pump canister (Ref. TASK 28-22-00-710-001).
Subtask 28-22-52-790-050
C. Make sure that there is no leakage at the pump canister (22) and remove the container.
5. Close-up
________ Subtask 28-22-52-410-050
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the manhole cover 147AZ (Ref. TASK 57-17-11-400-001).
(3)
Close the main door of the left main gear (Ref. TASK 32-12-00-410-001).
(4) Remove the access platform(s). Subtask 28-22-52-650-051
B. Refuel the center tank (Ref. TASK 12-11-28-650-003).
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____________________________________________
1. General_______
The valve of the crossfeed system is usually closed, and in this configuration it divides the main fuel pump system (Ref. 28-21-00) into two parts (one part for each engine). When the crossfeed valve is open, the two fuel supplies are connected together. Thus the two engines can be supplied with fuel from one of the wing tanks or from the two wing tanks.
The crossfeed system is operated manually by the X FEED pushbutton switch 4QE. The X FEED pushbutton switch is installed in the cockpit on the fuel control panel 40VU.
The Engine/Warning Display (EWD) (Ref. 31-66-00) and the System Display (SD) (which together make the ECAM) give crossfeed system information to the crew. If specified failures occur:
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