- go to step (9).
(b) If the 28VDC is not available:
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.
「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, 051-061, 101-105, 201-203, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page 247
May 01/05 CES A. Procedure
R 2_ Repair all the unserviceable wiring and connectors (Ref. ESPM
R 20-00-00).
3_ Do the test given in Para. 3.B.
R (9) If the fault continues or if there is no continuity in Step (5):
R (a) Drain, open and vent the tank (Ref. AMM TASK 28-10-00-910-001)
R and (Ref. AMM TASK 28-10-00-910-002).
R
R (b) Do a wiring check of the HARNESS-CHAN A, CTR TK (17QT) (Ref. AWM
R 28-46-09) and replace, if necessary (Ref. AMM TASK 28-42-44-000-
R 001) and (Ref. AMM TASK 28-42-44-400-001).
R
R (c) If the harness is serviceable, replace the SENSOR-LOW LVL, L CTR
R TK CHANNEL A (21QJ) (Ref. AMM TASK 28-46-15-000-004) and (Ref.
AMM TASK 28-46-15-400-012).
**ON A/C 301-399,
(1) Do the steps applicable to the test equipment available.
(2) Test Equipment 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.
(a) If there is: R
- approved test equipment available, go to Step (3) R
- no approved test equipment available, go to Step (6).
R (3) Get access to the tank wall connector 7509VC (for the center tank
R harness 17QT) in the right MLG bay (Ref. AMM TASK 32-12-00-010-001).
(4) Disconnect the free connector 7509VC-A from the receptacle 7509VC.
(5) Do a resistance check of the sensor 21QJ at the tank wall connector 7509VC between pins L and Y (Ref. AWM 28-46-09). R Make sure the resistance is between 330 and 480 ohms.
If there is: R
「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, 051-061, 101-105, 201-203, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page 248
301-399, May 01/05 CES
- continuity as specified, go to Step (6) R
- no continuity as specified (resistance check out of range), go to Step (9).
NOTE : The sensor status (wet or dry) and fuel/air temperature will
____ have an effect on the resistance value.
(6) Replace the FLSCU-1 (7QJ) (Ref. AMM TASK 28-46-34-000-001) and (Ref. AMM TASK 28-46-34-400-001).
(7) If the fault continues:
R (a) Get access to the tank wall connector 7509VC (for the center tank R harness 17QT) in the right MLG bay (Ref. AMM TASK 32-12-00-010-
001).
(b) Disconnect the free connector 7509VC-A from the receptacle 7509VC.
(c) Do a check (Ref. AWM 28-46-09) of the aircraft wiring (sensor input wire - H) between the FLSCU-1 rack connector AB, pin 12A and the tank wall free connector 7509VC-A, pin L.
(d) Do a check (Ref. AWM 28-46-09) of the aircraft wiring (sensor input wire - L) between the FLSCU-1 rack connector AB, pin 12B and the tank wall free connector 7509VC-A, pin Y.
(e) Do a check (Ref. AWM 28-46-06) of the aircraft wiring (FLSCU-1 BITE 2 test command wire) between the FLSCU-1 rack connector AA, pin 15A and the FQIC rack connector AB, pin 14E.
(f) Do a check (Ref. AWM 28-46-09) of the aircraft wiring (FLSCU-1 LS6 output wire) between the FLSCU-1 rack connector AB, pin 2B and the FQIC rack connector AC, pin 3A.
R (g) Repair all the unserviceable wiring and connectors (Ref. ESPM 20-R 00-00).
(h) Connect the free connector 7509VC-A to the tank wall receptacle 7509VC.
(i) Do the test given in Para. 3.B.
(8) If the fault continues, do a test (Ref. AWM 28-26-03) with a multimeter to see if 28VDC is available at the FLSCU-1 (7QJ) rack connector AA, pin 1D.
(a) If the 28VDC is available:
- go to step (9).
「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 : 301-399, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page 249
May 01/05 CES
(b) If the 28VDC is not available: 1 Do a check of the aircraft wiring (Ref. AWM 28-26-03) between:
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 FUEL 燃油4(58)
