The test required is as follows:
(a) Continuity test, with a multimeter, of each three phase wire (from end to end) (Ref. ESPM 20-52-21).
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(b) Insulation test, with a 500VDC insulation tester, between each phase wire (pole) and ground (Ref. ESPM 20-52-24).
(c) Insulation test, with a 500VDC insulation tester, between each phase wire and the other two wires (pole to pole) (Ref. ESPM 20-52-24).
(16) Repair/replace the unserviceable wiring and connectors.
CAUTION : DO NOT USE IN-LINE SPLICES TO REPAIR SECTIONS OF ELECTRICAL
_______ CABLE THAT ARE BEHIND A FAIRING OR IN A CONDUIT. THIS WILL MAKE SURE THAT IT IS POSSIBLE TO SEE THE REPAIR FOR AN INSPECTION (REF. ESPM 20-53-29).
(a) If the fuel pump supply cable between the connector 25QA-A(26QA-A) and the related junction box (bracket assembly) on the rear spar is seen to be damaged, repair as follows:
1 If necessary, replace the unserviceable:
_
- protective sleeve
- wire(s)
- connector.
2 Connect the new wire(s) of the fuel pump supply cable where
_ the wiring passes through the junction box (bracket assembly), by a splice(s) (Ref. ESPM 20-53-21).
3 Make sure that the length of the new supply cable when
_ assembled, between the front face of the connector 25QA-A(26QA-A) and the forward face of the cable guide (that shows outside the wing-skin) is:
- 1320 mm (51.97 in) for the left (inner) wing tank pump No. 2
- 25QA
- (1345 mm (52.95 in) for the right (outer) wing tank pump No. 2 - 26QA).
4 If necessary, make any final adjustment in the length of the
_ supply cable across the lower surface of the wing during the installation of the rear fairing.
5 Feed the surplus cable (small amount only) into the flexible
_ conduit to the junction box (bracket assembly) on the rear spar.
6 Make sure that the supply cable is held tight by the P-clip at
_
the cable guide.
NOTE : It is important that the fuel pump supply cable is
____ installed correctly as given in steps 2_ thru 6_. Incorrect installation of the cable can cause it to get damaged. If the cable is too short it will put tension on the wires and plug. If the cable is too long you
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will not be able to install the fairings correctly. This is because the unwanted cable (excess length) will become looped and get trapped during the installation of the intermediate and rear fairings.
(17) The fuel pump supply cable end connector 25QA-A(26QA-A) must stay disconnected.
(18) Install the fuel pump, rear and intermediate, fairings (Ref. AMM TASK 28-21-49-400-001). Make sure that the fuel pump supply cable does not get caught under the fairings.
(19) Do a wiring test, as detailed in the step (15), of the aircraft wiring (three phase electrical supply) (Ref. ASM 28-21/02) between the CNTOR-L(R) WING TK PUMP 2 SPLY 19QA(20QA) and the PUMP-FUEL No. 2, L(R) WING TK connector 25QA-A(26QA-A).
(a) If the wiring test:
1 Is serviceable, do step (20).
_
2 Is unserviceable, do steps (15) thru (19) again.
_
(20) Connect the fuel pump supply cable end connector 25QA-A(26QA-A) to the fuel pump receptacle.
(21) Close (reset) the C/B-7QA(8QA).
(22) Do the Operational Test of the Wing-Tanks Fuel Control (Ref. AMM TASK 28-21-00-710-001).
**ON A/C ALL
5. Close-up________
A. Procedure
(1) Make sure that the fuel pump is installed correctly and the two bolts that attach the pump have been torque tightened (Ref. AMM TASK 28-21-51-400-001).
(2) Install the fuel pump cover plate and the front fairing (Ref. AMM TASK 28-21-51-400-001).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
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CES R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
TASK 28-21-00-810-829
Fuel - Center Tank Pump 1(2), Power Supply - C/B-29QA(30QA) Tripped
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本文链接地址：A320 Trouble Shooting Manual 排故手册 FUEL 燃油2(5)
