(a) On the MCDU use the print key to make a record of each page (1 thru 3/4) and mark as initial FQIC. Keep for possible (future) reference.
(2) Temporarily replace the FQIC 3QT with a serviceable item (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).
NOTE : Make sure that the FQIC to be installed is of the same type as
____
that removed (Ref. IPC 28-42-34).
NOTE : The step (2) has been included because it is important to make
____ sure that the FQIC 3QT is not the cause of the malfunction before you continue the procedure.
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Aug 01/05 CES
(3) Do the Interrogation of the FQIS Input Parameters Pages (Ref. AMM TASK 28-42-00-740-003).
(a) On the MCDU use the print key to make a record of each page (1 thru 3/4) and mark as temporarily installed FQIC. Keep for possible (future) reference.
(4) If the FQIS and ECAM FQIs do not fluctuate, complete the installation of the FQIC (3QT) (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).
(5) If the FQIS and ECAM FQIs continue to fluctuate:
(a) Remove the temporarily installed FQIC 3QT and install the initial FQIC (3QT) (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).
(b) Do the test given in Para. 3.B.
(6) If the fault continues, get the MCDU print outs of the FQIS input parameters pages, that you got (recorded) in steps (1) and (3).
(7) Compare the two sets of FQIS input parameters records (paper printouts) and look for a value or values that can cause the FQIs to fluctuate, for example:
- compare fuel probe parameters (values - CAD K, DENS, CIC K, INNTEMP, OUTTEMP,PITCH F and ROLL F) with the others given on page 1 for similarity of the fuel conditions and ambient temperatures
- compare fuel probe capacitance values with the value of the same probe in the opposite wing or group
- look for blank indications (of related capacitance values) for a harness group.
(a) If (on the parameter page 1) the pitch shows PITCH A and ROLL A, go back to Para. 3.B., step (3) and start the procedure from there again.
NOTE : An A, after PITCH and ROLL, shows that the pitch and roll
____ inputs are from the ADIRS. To eliminate the external pitch and roll inputs as the possible cause of the FQI fluctuations, the ADIRS must be set to OFF. An F, after PITCH and ROLL, shows that the pitch and roll has been made by the FQIS internally.
(8) If necessary, monitor the FQIS input parameters pages at the MCDU screen live. Look for an unusual or incorrect value, an intermittent value, or one that is seen to have unexplained fluctuations.
NOTE : The FQIS input parameter pages are not automatically updated.
____ To see the operation of the fuel system via the CFDS (FUEL), input parameter pages in real-time the pages must be continually updated. Use the NEXT PAGE control on the MCDU to
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201-299, 401-499, Aug 01/05 CES cycle the pages to update the screen. If this procedure is not used the data will stay as they were at the time of the page (menu option) selection.
(9) Make an analysis from the input parameter results (records made in steps (1), (3), and from the MCDU screen direct in step (8)) with the steps (items) that follow:
(a) If you are not sure of the quality of the aircraft fuel: 1 Defuel all the aircraft tanks (Ref. AMM TASK 28-25-00-650-
_
001).
a Drain the remaining fuel from all the tanks to make sure
_ that there is no water in the tanks (Ref. AMM TASK 28-25-00-650-003) (and if applicable (Ref. AMM TASK 28-25-00-650-005)).
b Do a check of the aircraft log to see that the
_ microbiological contamination of the aircraft fuel tanks procedure has been complied with. If necessary, do (Ref. AMM TASK 28-11-00-600-004) and (Ref. AMM TASK 28-11-00-600-007).
c Refuel with fuel of the correct specification (Ref. AMM
_ TASK 12-11-28-650-003) or (Ref. AMM TASK 12-11-28-650-004).
d Do the test given in Para. 3.B.
_
(b) If a fuel probe capacitance value is not with-in range, replace the related LRU (Ref. TSM PB 101) for the related Task number.
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本文链接地址：A320 Trouble Shooting Manual 排故手册 FUEL 燃油4(5)
