- make sure that the cell contents are stable for twenty (20) minutes.
(2) If the crossfeed valve does not open or close, do the procedure (Ref. TASK 28-23-00-810-801).
(3) If the crossfeed valve P/BSW-4QE ON and/or OPEN legends do not operate as given in the test, do the procedure (Ref. TASK 28-23-00-810-802).
(4) If the crossfeed valve symbol on ECAM FUEL system display page is not shown correctly, do the procedure (Ref. TASK 28-23-00-810-804).
(5) If the fuel tank contents continue to increase and decrease when the crossfeed valve is (or appears to be) closed (shut), do Para. 4.A.
NOTE : The system is pressure tested with fuel supplied from the fuel
____ pumps. The increase and decrease in the fuel tank contents shows that fuel continues to leak through a closed (shut) crossfeed valve or another unserviceable component in the engine supply system and/or refuel gallery.
「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 ∞∞28-23-00∞∞∞∞∞∞∞∞∞∞Page 210
Aug 01/05 CES
R **ON A/C 301-399,
R A. Test
R (1) Do the applicable parts of the procedure for the operational test of
R the crossfeed valve using individual motors (Ref. AMM TASK 28-23-00-
R 720-001) with reference to the notes that follow.
R NOTE : For the fuel configuration use 2000kg(4400lb) approximately in____
R each wing tank, and 1000kg(2200lb) or less in the center tank.
R The fuel quantity is not critical but there must be sufficient
R ullage (space above the fuel surface) in each tank to receive
R fuel from the other tanks.
R NOTE : During the flow test with pump pressure and the crossfeed____
R valve closed:
R - make sure that the tank contents are stable for twenty (20)
R minutes.
R (2) If the crossfeed valve does not open or close, do the procedure
R (Ref. TASK 28-23-00-810-801).
R (3) If the crossfeed valve P/BSW-4QE ON and/or OPEN legends do not
R operate as given in the test, do the procedure (Ref. TASK 28-23-00-
R 810-802).
R (4) If the crossfeed valve symbol on ECAM FUEL system display page is not
R shown correctly, do the procedure (Ref. TASK 28-23-00-810-804).
R (5) If the fuel tank contents continue to increase and decrease when the
R crossfeed valve is (or appears to be) closed (shut), do Para. 4.A.
R NOTE : The system is pressure tested with fuel supplied from the fuel____
R pumps. The increase and decrease in the fuel tank contents
R shows that fuel continues to leak through a closed (shut)
R crossfeed valve or another unserviceable component in the
R engine supply system and/or refuel gallery.
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May 01/04 CES
**ON A/C ALL
4. Fault Isolation
_______________ R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
A. Procedure
(1) If necessary, release (out) the P/BSW-4QE.
(2) Get access to the actuator, crossfeed valve (5QE) (Ref. AMM TASK 28-23-51-000-001).
(3) Do a check of the crossfeed actuator-5QE and valve-10QM installation (interface) to make sure that they are installed correctly (Ref. AMM TASK 28-23-51-400-001).
(a) Make sure that the V-clamp, that attaches the actuator to the valve, is installed correctly.
1 If necessary, re-install (Ref. AMM TASK 28-23-51-400-001).
_
(b) Make sure that the see/feel indicator shows closed. 1 If the see/feel indicator shows:
_ a Open, do the procedure (Ref. TASK 28-23-00-810-801).
_
b Closed, do step (4).
_
(4) Replace the VALVE-FUEL CROSSFEED (10QM) (Ref. AMM TASK 28-23-41-000-001), and (Ref. AMM TASK 28-23-41-400-001).
(5) Do the test given in Para. 3.A.
(6) If no fault is found:
- set the aircraft maintenance configuration as follows to test the DEFUEL/XFR valve with fuel pump pressure:
(a) If necessary, do the EIS start procedure (ECAM only) (Ref. AMM TASK 31-60-00-860-001).
(b) On the ECAM Control panel 11VU, push (in) the FUEL P/BSW. 1 Make sure the FUEL System Display page is shown on the lower 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(27)
