- Trouble-shooting Data (Ref. P. Block 301).
With the HIGH LVL TEST switch in the central (released) position
the lamp state, off or on, must agree with the bit indicator 0 or
1 respectively, in the Input Parameters Page 3.
NOTE : OPTIONAL TESTING:
____ Where a PSDA321-1 Test Set is available, a check can be made before a decision is made to go into or close up a fuel tank. The Test Set enables a GO/NOGO check to be made of the tank mounted components and wiring from the tank wall connectors.
「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 A267
Aug 01/05 CES **ON A/C ALL
4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
A. If the RIGHT HI LVL Indicator light fails to change state, from off to on, or from on to off:
- swap the FLSCU-2 (9QJ) with FLSCU-1 (7QJ), (Ref. AMM TASK 28-46-34-000-001), and (Ref. AMM TASK 28-46-34-400-001).
(1) Do the test given in Para. 3.A.
(2) If the RIGHT HI LVL Indicator light changes state during the test but the fault has transfered to LEFT HI LVL Indicator light:
- replace the FLSCU-1 (7QJ), (Ref. AMM TASK 28-46-34-000-001), and (Ref. AMM TASK 28-46-34-400-001).
(3) Do the test given in Para. 3.A.
(4) If the fault continues:
(5) Remove Panel Assy-Refuel (800VU) (Ref. AMM TASK 28-25-55-000-001).
(6) Do a check (Ref. AWM 28-46-02) with a multimeter of the SW-TEST/HI/LTS (2QJ) between:
- connector 4023VC, pin <C, and connector 4024VC, pin R, on the Panel
Assy-Refuel (800VU). The multimeter must show: - open circuit for the switch in the central (released) position
- closed circuit for the switch in the TEST position.
NOTE : The LTS test checks the 28VDC supply to the Panel Assy-Refuel
____
(800VU).
(7) Replace the Panel Assy-Refuel (800VU), if it fails Step (6), (Ref. AMM TASK 28-25-55-000-001), and (Ref. AMM TASK 28-25-55-400-001).
NOTE : If due to airline operational conditions it is not possible to
____ replace the Panel Assy-Refuel (800VU) and internal Trouble-shooting is required, go to Step (12).
(8) If the fault continues do a wiring check (Ref. AWM 28-46-01), and (Ref. AWM 28-46-02) of the aircraft wiring:
- between the Panel Assy-Refuel (800VU), connector 4024VC, pin R and the FLSCU-2 rack connector AA, pin 13B
- between the Panel Assy-Refuel (800VU), connector 4024VC, pin S and the FLSCU-2 rack connector AA, pin 7A
- between the FLSCU-2 rack connector AA, pin 6A and the DC1 ground/earth point
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Aug 01/05 CES
- between the FLSCU-2 rack connector AB, pin 10A and the tank wall connector 4039VC, pin <V
- between the FLSCU-2 rack connector AB, pin 10B and the tank wall connector 4039VC, pin EE.
(9) Repair all the unserviceable wiring and connectors.
(10) Do the test given in Para. 3.A.
(11) If the fault continues:
(a) Drain, open and vent the tank (Ref. AMM TASK 28-10-00-910-001).
(b) Do a check of the HARNESS-CHAN A, R WING TK INR (13QT2), (Ref. AWM 28-46-02).
(c) If the harness is unserviceable:
- replace the harness (Ref. AMM TASK 28-42-43-000-006) and (Ref. AMM TASK 28-42-43-400-006).
(d) If the harness is serviceable:
- replace the SENSOR-HI LEVEL, RIGHT WING TANK INNER CHANNEL A (17QJ2) (Ref. AMM TASK 28-46-15-000-001) and (Ref. AMM TASK 28-46-15-400-009).
(12) Panel Assy-Refuel (800VU) Internal Trouble-shooting (Ref. AWM 28-46-01) and (Ref. AWM 28-46-02):
(a) Check/replace the SWITCH-TEST/HIGH/LTS (2QJ) (part of 800VU).
(b) Check/repair the Panel Assy-Refuel (800VU) internal wiring as follows:
- connector 4023VC, pin <C to terminal block 4001VT, terminal 5C
- terminal block 4001VT, terminal 5J to SW-TEST/HI/LTS (2QJ), terminal 1B
- SW-TEST/HI/LTS (2QJ), terminal 3B to connector 4024VC, pin R
- connector 4024VC, pin S to IND-HI LVL/RIGHT (4QJ), terminal I.
(c) Install the Panel Assy-Refuel (800VU) (Ref. AMM TASK 28-25-55-400-001). 中國航空網(wǎng) www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 FUEL 燃油4(106)
