_

 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, R TK PUMP 1 (64QA), terminal B2

 - the C/B-FUEL/SMOKE/CONFIG/PUMP CTL (55QA), terminal 2 and the RELAY-BUS 1/ESS, R TK PUMP 1 (64QA), terminal X1

 - the RELAY-BUS 1/ESS, R TK PUMP 1 (64QA), terminal X2 and the P/BSW-EMER ELEC PWR/GEN 1 LINE (13XU), terminal D1

 「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 A221
 May 01/04R CES

 - the RELAY-BUS 1/ESS, R TK PUMP 1 (64QA), terminal B3 and the P/BSW-FUEL/R TK PUMPS/1 (14QA), terminal A3

 - the P/BSW-FUEL/R TK PUMPS/1 (14QA), terminal A1 and the CNTOR-R WING TK STBY SPLY, PUMP 1 (54QA), terminal X

 - the CNTOR-R WING TK STBY SPLY, PUMP 1 (54QA), terminal Z and the CNTOR-R WING TK PUMP 1 SPLY (18QA), terminal 4

 - the CNTOR-R WING TK PUMP 1 SPLY (18QA), 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 A222
 May 01/04R
 CES

 TASK 28-21-00-810-811

 Fuel Pumps - Left Wing Tank Fuel Pump No. 2 Contactor Control Failure
 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.
 1. Possible Causes_______________
 - CNTOR-L WING TK PUMP 2 SPLY (19QA) - P/BSW-FUEL/L TK PUMPS/2 (15QA) - aircraft wiring
 2. Job Set-up Information______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific  multimeter
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------

28-21-00-810-803
ESPM 20-00-00 AMM 28-21-00-710-001 ASM 28-21/02
 3. Fault Confirmation
__________________
 A. TestFuel Pumps - Left Wing Tank Fuel Pump No. 2 (Inner) 25QA System Malfunction
Operational Test of the Wing-Tank Fuel Control

 (1) If necessary, do the job set-up of the Operational Test of the Wing-Tanks Fuel Control (Ref. AMM TASK 28-21-00-710-001).

 (2) Push (in) the L TK PUMPS 2 P/BSW (15QA).

 (3) Examine the left wing-tank fuel-pump 2 symbol, on the FUEL system page, at the ECAM lower display unit.

 「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 A223
 May 01/04 CES

 (4) If the symbol shows:

 - green in-line, no more maintenance steps are necessary (normal operation)

 - amber cross-line, do Para. 4.A.

 - amber LO, do the TSM procedure Left Wing Tank Pump No. 2 (Inner) 25QA System Malfunction (Ref. TASK 28-21-00-810-803).

 NOTE : The amber LO is only shown when the signals that follow occur
____
 at the same time:

 - the contactor closed (on) and

 - the left tank pump 2 low fuel pressure.

 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.

 (a) Do a check of the electrical circuits (Ref. ASM 28-21/02) as follows:
 1 At the panel (contactor box) 107VU, remove the contactor-19QA.
_
 2 At the contactor (relay) base 19QA-A, make sure that:

_

 - a ground is available at terminal Z
　
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