- Aircraft Maintenance Manual (AMM) Chapters 26-12-00, 26-21-00, 28-24-00, and 76-12-00 - Description and Operation (D and O)
- Trouble Shooting Manual (TSM), Task Supporting Data, (Ref. P. Block 301)
- Aircraft Schematic Manual (ASM) (Ref. ASM 26-21/02), (Ref. ASM 28-24/01), and (Ref. ASM 76-12/01).
4. Fault Isolation
_______________
A. On the ENG/APU FIRE PANEL (1WD) located on the overhead panel 20VU, make sure that the ENG 2 FIRE PUSH pushbutton switch (P/BSW) is in the closed and guarded position.
(1) On the ECAM Control Panel 11VU, push (in) the FUEL P/BSW to get the FUEL system page on the ECAM lower display unit (DU).
(2) Set the ENG/MASTER 2 (2KC) switch (panel 115VU) to OFF.
(3) Disconnect the electrical supply cable connector (10QG-A) from the ACTUATOR-LP FUEL VALVE, ENG 2 (10QG).
(4) Examine the ENG 2 LP fuel valve symbol on the FUEL system page.
(a) If the ENG 2 LP fuel valve symbol shows in transit (diagonal amber line):
1_ Temporarily put a ground/earth on free connector 10QG-A, pin B
and examine the ENG 2 LP fuel valve symbol on the FUEL system
page, - make note.
2_ Remove the ground/earth temporarily placed on free connector
10QG-A, pin B.
3_ Temporarily put a ground/earth on free connector 10QG-A, pin D
and examine the ENG 2 LP fuel valve symbol on the FUEL system
page, - make note.
4_ Remove the ground/earth temporarily placed on free connector
10QG-A, pin D.
5_ If in steps 1_ and 3_ the LP fuel valve symbol agrees with the
table that follows:
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--------------------------------------------------------------
| CONNECTOR 10QG-A, PIN GROUNDED | LP FUEL VALVE SYMBOL |
|--------------------------------|-----------------------------|
| B | AMBER CROSS LINE = CLOSED |
| D | AMBER IN LINE = OPEN |
--------------------------------------------------------------
- do a check (Ref. AWM 28-24-02) of the aircraft wiring (motor 1/ground/earth) between the ACTUATOR-LP VALVE, ENG 2 (10QG) connector 10QG-A, pin E and the ground/earth point 4002VN(621STA332).
6 Repair all the unserviceable wiring and connectors.
_
7 Connect the electrical supply cable connector 10QG-A to the
_ ACTUATOR-LP FUEL VALVE, ENG 2 (10QG).
8 Do the Operational Test of the ENG 1(2) LP Fuel Valve
_ 12QM(13QM) (Ref. AMM TASK 28-24-00-710-002).
9 If the fault continues:
_
- replace the ACTUATOR-LP FUEL VALVE, ENG 2 (10QG), (Ref. AMM TASK 28-24-51-000-001), and (Ref. AMM TASK 28-24-51-400-001).
(b) If the ENG 2 LP fuel valve symbol does not show in transit:
- do a check (Ref. AWM 31-54-77) of the aircraft wiring(closed signal line/SDAC-1) between the ACTUATOR-LP VALVE, ENG 2 (10QG) connector 10QG-A, pin B and the SDAC-1 (1WV-1) connector AD, pin 2J
- do a check (Ref. AWM 31-54-77) of the aircraft wiring (open signal line/SDAC-1) between the ACTUATOR-LP VALVE, ENG 2 (10QG) connector 10QG-A, pin D and the SDAC-1 (1WV-1) connector AD, pin 1J
- do a check (Ref. AWM 31-54-77) of the aircraft wiring(closed signal line/SDAC-2) between the ACTUATOR-LP VALVE, ENG 2 (10QG) connector 10QG-A, pin B and the SDAC-2 (1WV-2) connector AD, pin 2J
- do a check (Ref. AWM 31-54-77) of the aircraft wiring (open signal line/SDAC-2) between the ACTUATOR-LP VALVE, ENG 2 (10QG) connector 10QG-A, pin D and the SDAC-2 (1WV-2) connector AD, pin 1J.
1 Repair all the unserviceable wiring and connectors.
_
(5) Examine the ENG 2 LP fuel valve symbol on the FUEL system page.
(6) If the fault continues:
- open the C/Bs 3WV (SDAC1) and 2WV (SDAC2) in turn:
(7) If the fault is displayed on one powered/active SDAC:
- swap SDACs to confirm the faulty LRU.
「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 ∞∞28-24-00∞∞∞∞∞∞∞∞∞∞Page 233
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(8) Check/replace the SDAC-1 (1WV1) or SDAC-2 (1WV2), (Ref. AMM TASK 31-55-34-000-001), and (Ref. AMM TASK 31-55-34-400-001) that causes the not correct LP fuel valve symbol to be shown on the FUEL system display (ECAM lower DU). 中國航空網 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2(45)
