7 Do the test given in Para. 3.A.
_
(d) If a leak is found in the center tank: 1 Get access to the applicable side of the center tank (Ref. AMM
_
TASK 28-21-52-000-003).
2 Examine the items that follow (to see/find out what can cause
_ the leak) for damage, incorrect assembly or installation:
a The applicable fuel pump canister including the blanking
_ plate installed on the unused fuel outlet. Replace, if necessary (Ref. AMM TASK 28-21-52-000-003) and (Ref. AMM TASK 28-21-52-400-003).
b The adjacent main-pump-system pipe-lines.
_ Replace, if necessary all the unserviceable pipe sections and connections (Ref. AMM TASK 28-00-00-000-001) and (Ref. AMM TASK 28-00-00-400-001).
3 Refuel the center fuel tank (Ref. AMM TASK 12-11-28-650-003).
_
4 Do the test given in Para. 3.A.
_ R **ON A/C 301-399,
R A. Procedure
R (1) Remove the (applicable) wing tank fuel pump (Ref. AMM TASK 28-21-51-R 000-001).
R (2) If, during the removal of the fuel pump:
R (a) Approximately 0.5 l (0.2 USgal) of fuel flows from the fuel pump
R drain, do step (3).
R (b) More than approximately 0.5 l (0.2 USgal) of fuel, or fuel
R continues to flow from the fuel pump drain:
R 1_ Re-install the drain plug/bolt.
R 2_Do step (4).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page B239
May 01/04 CES
R (3) Remove the check valve from the fuel pump canister (Ref. AMM TASK 28-R 21-52-000-004).
R (a) Do a check of the check valve, to see if it can open, as follows:
R 1_ Push the valve in (away from the valve seat). Make sure that
R the valve has a full and free movement.
R 2_ If the fuel-pump canister check-valve does not have a full and
R free movement, replace it with a serviceable item.
R (b) Install the check valve in the fuel pump canister (Ref. AMM TASK
R 28-21-52-400-004).
R (c) Install the fuel-pump (Ref. AMM TASK 28-21-51-400-001).
R (d) Do the test given in Para. 3.A.
R (4) If the fault continues:
R (a) Do the procedure for the Leak Test of the Main-Pump-System
R Pipe-Lines (Ref. AMM TASK 28-21-00-790-001).
R Use the wing tank fuel pumps on the opposite wing to generate a
R fuel pressure to test the applicable engine feed pipe lines.
R (b) If no leak is found, no more trouble shooting steps are
R necessary.
R (c) If a leak is found:
R 1_ Get access to the applicable wing tank collector cell (Ref.
R AMM TASK 28-21-52-000-001).
R 2_ Examine the items that follow (to see/find out what can cause
R the leak) for damage, incorrect assembly or installation:
R a_ The applicable fuel pump canister.
R Replace, if necessary (Ref. AMM TASK 28-21-52-000-001) /
R (Ref. AMM TASK 28-21-52-000-002) and (Ref. AMM TASK 28-21-R 52-400-001) / (Ref. AMM TASK 28-21-52-400-002).
R b_ The related check valve (149QM) (check valve (151QM)) and
R check valve (150QM) (check valve (152QM)).
R Replace, if necessary, the unserviceable check valve.
R c_ The adjacent main-pump-system pipe-lines.
R Replace, if necessary all the unserviceable pipe sections
R and connections (Ref. AMM TASK 28-00-00-000-001) and (Ref.
R AMM TASK 28-00-00-400-001).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 301-399, ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page B240
May 01/04 CES
R d_ The related suction valve (Ref. AMM TASK 28-21-00-280-001).
R Replace, if necessary (Ref. AMM TASK 28-21-42-000-001) and
R (Ref. AMM TASK 28-21-42-400-001).
R 3_ Get access to the related wing tank (Ref. AMM TASK 28-21-52-
R 000-001).
R 4_ Examine the engine fuel supply pipe-line, between the Rib 2
R and the exit point to the engine pylon at the forward spar,
R for damage, incorrect assembly or installation.
R 5_ Replace all the unserviceable pipe sections and connections
R (Ref. AMM TASK 28-00-00-000-001) and (Ref. AMM TASK 28-00-00-
R 400-001).
R 6_ Refuel the applicable fuel tank (Ref. AMM TASK 12-11-28-650-
R 003).
R 7_ Do the test given in Para. 3.A.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 301-399, ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page B241 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 FUEL 燃油2(19)
