(c) If the harness is serviceable, replace the SENSOR-LOW LVL, L CTR TK CHANNEL A (21QJ) (Ref. AMM TASK 28-46-15-000-004) and (Ref. AMM TASK 28-46-15-400-012).

 1_ Do a check of the aircraft wiring (Ref. AWM 28-21-07) between:
 - the FLSCU-1 (7QJ) rack connector AA, pin 1D and the
 C/B-31QA.
 2_ Repair all the unserviceable wiring and connectors (Ref. ESPM
 20-00-00).
 3_ Do the test given in Para. 3.B.

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page 252
 201-299, 401-499, Aug 01/05 CES

 **ON A/C ALL

 TASK 28-46-00-810-807
 L(R) Full Level Sensor 1 23QJ1(2)
 WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
 WARNING : WHEN YOU DO WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST
_______ EQUIPMENT THAT IS APPROVED (REFER TO INTERNATIONAL OR NATIONAL SPECIFICATIONS FOR INTRINSICALLY SAFE TEST EQUIPMENT, E.G. EN50-020, UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE FIRE OR AN EXPLOSION.
 1. Possible Causes
_______________
 - FLSCU-1 (7QJ)

 - FLSCU-2 (9QJ)

 - SENSOR-FULL LVL, L WNG TK INR 1 CHANNEL B (23QJ1)

 - SENSOR-FULL LVL, R WNG TK INR 1 CHANNEL B (23QJ2)

 - aircraft wiring

 - HARNESS-GROUP B, L WING TK INR (14QT1)

 - HARNESS-GROUP B, R WING TK INR (14QT2)

 - HARNESS - GROUP B, L WING TK (63QT)

 - HARNESS - GROUP B, R WING TK (64QT)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-46-00-810-818 FLSCU1(2) 7QJ(9QJ) R ESPM 20-00-00 AMM 28-10-00-910-001 Safety Procedures When You Do Work in a Fuel Tank R AMM 28-10-00-910-002 Access to the Fuel Tanks and the Work Areas AMM 28-42-43-000-005 Removal of the Wing Tank Harness 57QT(58QT), 63QT(64QT) AMM 28-42-43-000-007 Removal of the Wing-Tank Inner-Cell Group B Harness
 14QT1(14QT2) R AMM 28-42-43-000-008 Removal of the Wing Tank Fuel Quantity Indicating R Probe Fused/Shorting Plug Connectors
 AMM 28-42-43-400-005 Installation of the Wing Tank Harness 57QT(58QT), 63QT(64QT) AMM 28-42-43-400-007 Installation of the Wing-Tank Inner-Cell Group B
 Harness 14QT1(14QT2) AMM 28-46-00-740-001 Functional (BITE) Test AMM 28-46-15-000-001 Removal of the Wing-Tank Fuel-Level Sensors AMM 28-46-15-400-009 Installation of the Wing-Tank Fuel-Level Sensors
 「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 ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page 253
 May 01/05 CES

 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 28-46-34-000-001 Removal of the Fuel-Level Sensing Control-Unit (FLSCU) (7QJ,9QJ) AMM 28-46-34-400-001 Installation of the Fuel-Level Sensing Control-Unit
 (FLSCU) (7QJ,9QJ)
 ASM 28-46/03
 AWM 28-46-07
 AWM 28-46-08
 AWM 28-46-10
 AWM 28-46-11
 AWM 28-46-12

 3. Fault Confirmation
__________________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 A. Test
 (1) Do the BITE test of the FLSS (Ref. AMM TASK 28-46-00-740-001).

 (2) Examine the FLSS STATUS page on the MCDU.

 (3) If the page shows messages for one or more of the other sensors and/or the FLSCU-1(2), do (Ref. TASK 28-46-00-810-818).

 (4) If the message 284615 L(R) FULL SENSOR 23QJ1(2):

 - is shown, do Para. 4.A.

 - is not shown, no work steps are necessary.

 NOTE : You can get more data from the:
____
 - Aircraft Maintenance Manual (AMM) Chap. 28-46-00, the Fuel Level Sensing System, Description and Operation (D and O)

 - Trouble Shooting Manual (TSM) - Task Supporting Data (Ref.

 P. Block 301)

 - Aircraft Schematic Manual (ASM) (Ref. ASM 28-46/03). You can get more Trouble-shooting data from the CFDS(FUEL):

 - Input Parameters Page 3 (Ref. P. Block 301), used with the Fuel Level Sensors Operating (Changeover) Values (Ref. P. Block 301)

 - FLSCU Trouble-shooting Data (Ref. P. Block 301).

 NOTE : OPTIONAL TESTING:
____ Where a PSD A320-2 Fuel Level Sensing Test Set is available measurements can be taken before a decision is made to go into or close up a fuel tank. The Test Set enables the tank mounted
　
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