R (2) If the fuel starts to transfer go to step (3). If the fuel does not
R start to transfer:
R (a) Set the L TK PUMPS 2 P/BSW (15QA) to OFF (release out). This will
R de-energize the contactor 19QA.
R (b) Before you do more steps, make sure that the wing area adjacent
R to the left inner fuel pump 25QA fairings and cover is not
R contaminated with fuel from a fuel leak or spillage.
R 1_ If necessary:
R a_ Repair all the leaks:
R - (Ref. AMM TASK 51-76-12-300-001)
R - (Ref. AMM TASK 51-76-12-300-002)
R - (Ref. SIL 57-0086).
R b_ Clean the area of the fuel spillage.
R (c) Remove all the fuel pump 25QA cable fairings (Ref. AMM TASK 28-R 21-49-000-001) and cover assembly (Ref. AMM TASK 28-21-51-000-R 001).
R (d) Disconnect the supply cable end connector 25QA-A from the fuel
R pump receptacle.
R (e) If, in step (c) or (d), any damage can be seen on the supply
R cable or the aircraft structure, go to step (j) 1_.
R (f) Set the L TK PUMPS 2 P/BSW (15QA) to ON (push in). This will
R energize the contactor 19QA and the 115VAC three phases will be
R supplied to the fuel pump connector 25QA-A.
R (g) Use a multimeter to do a test, to make sure that each of the
R 115VAC three phases are available at the connector 25QA-A (Ref.
R ASM 28-21/02).
R (h) Set the L TK PUMPS 2 P/BSW (15QA) to OFF (release out). This will
R de-energize the contactor 19QA.
R 1_ Use a multimeter to do a test, to make sure that each of the
R 115VAC three phases are not available at the connector 25QA-A.
R NOTE : This is to make sure that the contactor 19QA does not
____ R stay in the on position (stuck/held on).
R (i) If the 115VAC three phase supply voltage measured in step (g) is R correct, replace the PUMP-FUEL NO 2, L WING TK (25QA) (Ref. AMM R TASK 28-21-51-000-001) and (Ref. AMM TASK 28-21-51-400-001).
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(j) If the 115VAC three phase supply voltage measured in step (g) is not correct (no voltage, incorrect voltage or a phase is missing), do all the sub-steps that follow:
1 Clean and dry:
_
- all the fuel pump cable fairings
- the fuel pump cover assembly
- the fuel pump supply cable and the related end connector
- the aircraft wing structure adjacent to the route of the supply cable across the wing surface
- the aircraft wing structure at the rear spar, adjacent to the landing light, where the fuel pump supply cable leaves the conduit and passes through the cable guide (bottom skin).
2 Make sure that good lighting is available.
_ Do a visual inspection and look for distortion (pinched or streched) damage (chafed or cut), discoloration, overheating (burnt/melted or arcing) liquid contamination, loose electrical connection or incorrect assembly, of the items that follow:
- the electrical receptacle
- the supply cable end connector 25QA-A
- the supply cable
- the cable guide
- the fuel pump fairings
- the aircraft wing structure adjacent to the route of the supply cable (across the wing surface and at the rear spar)
- junction box (bracket assembly) on the rear spar.
NOTE : Incorrect installation of the fuel pump fairings can
____ damage the supply cable. This can cause electrical arcing and damage to the aircraft structure.
3 If any damage (electrical wiring, fairing or structural) is
_ found, tell AIRBUS within 10 days.
4 If the aircraft structure is damaged, refer to Skins and
_ R Plating - Allowable Damage, P. Block 101, (Ref. ASRM 57-21-11).
5 If necessary, replace the damaged fairings with serviceable
_
items.
6 If the fuel pump supply cable between the connector 25QA-A and
_ the related junction box (bracket assembly) on the rear spar is seen to be damaged, repair as follows:
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R CAUTION : DO NOT USE IN-LINE SPLICES TO REPAIR SECTIONS OF
_______
R ELECTRICAL CABLE THAT ARE BEHIND A FAIRING OR IN A
R CONDUIT.
R THIS WILL MAKE SURE THAT IT IS POSSIBLE TO SEE THE
R REPAIR FOR AN INSPECTION (REF. ESPM 20-53-29).
R a_ If necessary, replace the unserviceable:
R - protective sleeve
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本文链接地址：A320 Trouble Shooting Manual 排故手册 FUEL 燃油1(94)
