- RELAY-CTR TK PUMPS 2 CTL (52QA)
- EIU-1 (1KS1)
- EIU-2 (1KS2)
- aircraft wiring between the RELAY 51QA(52QA), pin X1 and the P/BSW-FUEL CTR TK/PUMP 1(2) 33QA(34QA), terminal B1
- aircraft wiring between the EIU-1 (1KS1) rack connector AB, pin 1C and the RELAY 51QA(52QA), base pin 1C
- aircraft wiring between the EIU-2 (1KS2) rack connector AB, pin 1C and the terminal block 1853VT, terminal 20U
- aircraft wiring between the ECB (59KD) rack connector AB, pin 5E and the terminal block 1853VT, terminal 20T
- RELAY 51QA(52QA) base
2. Job Set-up Information
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A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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No specific multimeter
B. Referenced Information
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REFERENCE DESIGNATION
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28-21-00-810-813 Fuel Pumps - Center Tank Fuel Pump No. 1 (Left Side) 37QA System Malfunction 28-21-00-810-814 Fuel Pumps - Center Tank Fuel Pump No. 2 (Right Side) 38QA System Malfunction 28-21-00-810-817 Fuel Pumps - Center Tank Fuel Pump No. 1 (Left Side) Contactor Control Failure (Manual Control) 28-21-00-810-818 Fuel Pumps - Center Tank Fuel Pump No. 2 (Right Side) Contactor Control Failure (Manual Control) AMM 28-21-00-710-005 Operational Check to Ensure that Both Center Tank Pumps Feed for 2 Minutes After Engine Start AMM 73-25-34-000-040 Removal of the Engine Interface Unit (EIU) (1KS1,1KS2)
「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, ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page B227
201-299, 401-499, Aug 01/05 CES
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AMM 73-25-34-400-040 Installation of the Engine Interface Unit (EIU)
(1KS1,1KS2)
ASM 28-21/03
ASM 28-21/04
AWM 28-21-05
AWM 28-21-06
AWM 28-21-07
AWM 49-61-03
AWM 73-25-05
AWM 73-25-06
3. Fault Confirmation
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A. Do the Operational Test of the Main Fuel Pump System to Ensure Both Center Tank Pumps Feed for 2 Minutes After an Engine Start (Ref. AMM TASK 28-21-00-710-005).
(1) If the center tank pumps operate as specified, further maintenance steps are not necessary.
(2) If the center tank pumps do not operate as specified, go to Para. 4.
4. Fault Isolation
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A. If the center tank fuel pumps fail to operate in the manual mode of operation, do the applicable task that follows:
- Fuel Pumps - Center Tank Pump-Fuel No 1 System Failure (Ref. TASK 28-21-00-810-813)
- Fuel Pumps - Center Tank Pump-Fuel No 2 System Failure (Ref. TASK 28-21-00-810-814)
- Fuel Pumps - Center Tank Pump-Fuel No 1 Contactor Control Failure (Manual Control) (Ref. TASK 28-21-00-810-817)
- Fuel Pumps - Center Tank Pump-Fuel No 2 Contactor Control Failure (Manual Control) (Ref. TASK 28-21-00-810-818).
(1) If the center tank fuel pumps fail in the two (2) minute automatic water scavenge function:
- remove and retain the RELAY 51QA(52QA).
(2) Examine the RELAY 51QA(52QA) and the relay base for any signs of damage or burning of the pins.
(3) Make sure the P/BSW-FUEL/CTR TK/PUMP 1(2) 33QA(34QA) is pushed in (set to on).
「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, ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page B228
201-299, 401-499, Aug 01/05 CES
(4) With a multimeter, do a test to make sure that 28VDC is available at the RELAY 51QA(52QA) base pin X1.
NOTE : Each Time Delay Opening (TDO) relay's power supply input to
____ pin X1 comes from its related center tank fuel pump P/BSW.
(5) If 28VDC was not available at RELAY 51QA(52QA) base pin X1 as in step (4):
(a) Do a check of the aircraft wiring between the RELAY 51QA(52QA), pin X1 and the P/BSW-FUEL CTR TK/PUMP 1(2) 33QA(34QA), terminal B1 (Ref. ASM 28-21/03) and (Ref. ASM 28-21/04).
(b) Repair all the unserviceable wiring and connectors. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 FUEL 燃油2(14)
