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| LRU/CHANNEL | SENSOR | FLSCU-1 FLSCU-2 FQIC |
| OUTPUT WIRE | FIN | CONNECTOR CONNECTOR CONNECTOR|
| | | AND PIN AND PIN AND PIN |
|------------------|--------|-------------------------------------------------|
| FLSCU-1 LOGIC 2 | 7QJ | AB-5D --------------------------------- AB-6K |
| | | |
| FLSCU-2 LS1 | 15QJ2 | AB-1A ------------- AB-9K |
| FLSCU-2 LS2 | 39QJ1 | AB-5A ------------- AB-10J |
| FLSCU-2 LS3 | 17QJ2 | AB-2A ------------- AB-11H |
| FLSCU-2 LS4 | 28QJ2 | AB-1B ------------- AB-10K |
| FLSCU-2 LS5 | 15QJ1 | AB-5B ------------- AB-11J |
| FLSCU-2 LS6 | 22QJ | AB-2B ------------- AB-11K |
| FLSCU-2 LS7 | 6QJ | AB-3A ------------- AB-12H |
| FLSCU-2 LS8 | NA | Not used |
| FLSCU-2 LS10 | 38QJ2 | AB-1C ------------- AB-12J |
| FLSCU-2 LS11 | 23QJ2 | AB-2C ------------- AB-12K |
| FLSCU-2 LS12 | 27QJ2 | AB-3C ------------- AB-13H |
| FLSCU-2 LS13 | 24QJ2 | AB-1D ------------- AB-13J |
| FLSCU-2 LS14 | 25QJ2 | AB-2D ------------- AB-13K |
| FLSCU-2 LS15 | 26QJ2 | AB-3D ------------- AB-14H |
| FLSCU-2 T1 | 29QJ2 | AB-4C ------------- AB-15J |
| FLSCU-2 T2 | 30QJ2 | AB-4D ------------- AB-15K |
| FLSCU-2 LOGIC 1 | 9QJ | AB-5C ------------- AB-14J |
| FLSCU-2 LOGIC 2 | 9QJ | AB-5D ------------- AB-14K |
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(a) Repair all the unserviceable wiring and connectors.
(b) Do the test given in Para. 3.B.
**ON A/C 301-399,
A. Procedure
(1) If the two FLSCUs are shown:
- replace FLSCU-1 (7QJ) and FLSCU-2 (9QJ), (Ref. AMM TASK 28-46-34-000-001) and (Ref. AMM TASK 28-46-34-400-001).
(2) If one FLSCU only is shown:
(a) Swap FLSCUs, (Ref. AMM TASK 28-46-34-000-001) and (Ref. AMM TASK 28-46-34-400-001).
(b) Do the test given in Para. 3.B.
(3) If the message changes sides:
- replace the FLSCU-1(2) 7QJ(9QJ) that shows the message (Ref. AMM TASK 28-46-34-000-001) and (Ref. AMM TASK 28-46-34-400-001).
「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 A237
May 01/05R CES
(4) If the fault continues, and the MCDU shows the original message:
- 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).
(5) If the message FLSCU-1(2) 7QJ(9QJ) is not shown:
- complete the installation of the FQIC (3QT) (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).
(6) If the message FLSCU-1(2) 7QJ(9QJ) is shown:
- remove the temporarily installed serviceable FQIC (3QT) (Ref. AMM TASK 28-42-34-000-001), and install the original FQIC (3QT) (Ref. AMM TASK 28-42-34-400-001).
(7) Make sure that the REFUEL panel door 192MB/522KB/622KB is open or (if installed) the cockpit refuel PWR P/BSW (23QU) is set to on.
NOTE : This step is necessary to energize the 28VDC FUELLING BUS 1,
____ 501PP, that is the source of the 28VDC (HIGH) supply to each FLSCU. The other three 28VDC supplies to each FLSCU are permanently available from the related fuel subsystem C/Bs.
(8) Use the procedure (Ref. AMM TASK 28-46-00-710-001) and do a test of the HI LVL lights, do not include Para. 4.B.
(9) If during step (8):
(a) A (any) HI LVL light comes on, go to step (10).
NOTE : This shows the 28VDC FUELLING BUS 1, 501PP is energized
____ and the 28VDC (HIGH) supply is available through the closed C/B-FUEL/HI/LVL/SPLY (1QJ).
(b) No HI LVL lights come on, troubleshoot the fault (Ref. P. Block 101 OBS).
(10) Use a multimeter do a check for each of the four 28VDC supply inputs at the FLSCU-1(2) 7QJ(9QJ) rack connector as shown in the table that follows. If a 28VDC supply is not available go to the step given.
If the two 28VDC (HIGH) supplies are NOT correct go to step (19).
If all the 28VDC supplies are correct go to step (20).
NOTE : The FLSCUs are energized from four discrete 28VDC sources.
____ The 28VDC supplies are applied to channels within each FLSCU as follows.
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本文链接地址：A320 Trouble Shooting Manual 排故手册 FUEL 燃油4(93)
