- stays an amber cross line, do the procedure for the Left Wing Tank Fuel Pump No. 1 Contactor Control Failure (Normal Supply) (Ref. TASK 28-21-00-810-807).

 - shows amber LO, do the procedure for the Left Wing Tank Fuel Pump No. 1 (Outer) 21QA System Malfunction (Ref. TASK 28-21-00-810-801).

 (b) If, during the procedure of the AMM Task referenced in step (1), the left wing-tank fuel-pump 1 symbol on the ECAM fuel page:

 - shows an amber cross line, do Para. 4.A.

 - shows amber LO, do the procedure for the Left Wing Tank Fuel Pump No. 1 (Outer) 21QA System Malfunction (Ref. TASK 28-21-00-810-801).

 4. Fault Isolation_______________
 A. Procedure
 (1) Do the initial checks as given in:
 - step (a), with a multimeter
 and/or

 - step (b), by substitution and replacement.

 「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 ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page A216
 May 01/04R
 CES

 (a) Do a check of the electrical circuits (Ref. ASM 28-21/01) as follows:
 1 At the panel (contactor box) 107VU, remove the contactor-53QA.
_

 2 At the contactor (relay) base 53QA-A, make sure that:
_

 - a ground is available at terminal Z (through the closed, de-energized, contacts of contactor-17QA, terminals 4 to 3)

 - 28VDC is available at terminal X, when the P/BSW-13QA is set to on (through the closed contacts A3 to A1).

 3 Replace all the unserviceable items.
_

 4 Make sure that the contactor-53QA removed in step 1_ is
_
 installed.

 5 Do the test given in Para. 3.A.
_

 (b) Swap (interchange) the items listed that follow, one at a time, with those from the right wing-tank fuel-pump 1 system where applicable:
 - the CNTOR-L WING TK STBY SPLY, PUMP 1 (53QA)

 - the CNTOR-L WING TK PUMP 1 SPLY (17QA)

 - the P/BSW-FUEL/L TK PUMPS/1 (13QA)

 - the RELAY-BUS 1/ESS. L TK PUMP 1 (63QA)

 - the P/BSW-EMER ELEC PWR/SMOKE DRILL (13XU).

 NOTE : The P/BSW-EMER ELEC PWR/SMOKE DRILL (13XU) is only
____ included to complete the list of possible causes. It can only be swapped with a serviceable spare.
 1 Do the test given in Para. 3.A.
_

 2 If the fault is removed/cleared:
_ a Replace all the unserviceable items.

_

 b Do the test given in Para. 3.A. for the left and right
_ wing-tank fuel-pumps 1.
 (2) If the fault continues:
 (a) Do a wiring check (Ref. ESPM 20-00-00) of the aircraft wiring (Ref. ASM 28-21/01) between:
 - the C/B-FUEL/SMOKE/CONFIG/PUMP CTL (55QA), terminal 2 and the RELAY-BUS 1/ESS, L TK PUMP 1 (63QA), terminal B2

 - the C/B-FUEL/SMOKE/CONFIG/PUMP CTL (55QA), terminal 2 and the RELAY-BUS 1/ESS, L TK PUMP 1 (63QA), terminal X1

 - the RELAY-BUS 1/ESS, L TK PUMP 1 (63QA), terminal X2 the P/BSW-EMER ELEC PWR/GEN 1 LINE (13XU), terminal C1

 「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 ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page A217
 May 01/04R CES

 - the RELAY-BUS 1/ESS, L TK PUMP 1 (63QA), terminal B3 and the P/BSW-FUEL/L TK PUMPS/1 (13QA), terminal A3

 - the P/BSW-FUEL/L TK PUMPS/1 (13QA), terminal A1 and the CNTOR-L WING TK STBY SPLY, PUMP 1 (53QA), terminal X

 - the CNTOR-L WING TK STBY SPLY, PUMP 1 (53QA), terminal Z and the CNTOR-L WING TK PUMP 1 SPLY (17QA), terminal 4

 - the CNTOR-L WING TK PUMP 1 SPLY (17QA), terminal 3 and the aircraft ground DC1 at 1176VT.

 (b) Repair all the unserviceable wiring and connectors (Ref. ESPM 20-00-00).

 (c) Do the test given in Para. 3.A.

 「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 ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page A218
 May 01/04R
 CES 28-21-00-810-802 28-21-00-810-808 ESPM 20-00-00

 TASK 28-21-00-810-810
 Fuel Pumps - Right Wing Tank Fuel Pump No. 1 Contactor Control Failure (Standby Supply)
 WARNING : OBEY THE FUEL SAFETY PROCEDURES._______ 
R R R R R  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.
　
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