W DOC AIRBUS | TSM A320F

Fuel Pumps - Right Wing Tank Fuel Pump No. 1 Contactor Control Failure (Normal Supply)

TASK 28-21-00-810-808-A
Fuel Pumps - Right Wing Tank Fuel Pump No. 1 Contactor Control Failure (Normal Supply)

WARNING: OBEY THE FUEL SAFETY PROCEDURES.
WARNING: DO NOT CLOSE AN OPEN (TRIPPED) CIRCUIT BREAKER RELATED TO A FUEL-PUMP. IF YOU CLOSE THE CIRCUIT BREAKER, THERE IS A RISK:
  • OF FIRE OR OF AN EXPLOSION
  • OF DAMAGE TO THE AIRCRAFT WIRING AND STRUCTURE.
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: EN50020, UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE FIRE OR AN EXPLOSION.
1. Possible Causes
  • CNTOR-R WING TK PUMP 1 SPLY [18QA]
  • CNTOR-R WING TK STBY SPLY, PUMP 1 [54QA]
  • P/BSW-FUEL/R TK PUMPS/1 [14QA]
  • RELAY-BUS 1/ESS. R TK PUMP 1 [64QA]
  • P/BSW-EMER ELEC PWR/GEN1 LINE [13XU]
  • aircraft wiring
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
MULTIMETER - STANDARD
 B. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 28-21-00-810-802-A
Fuel Pumps - Right Wing Tank Fuel Pump No. 1 (Inner) 22QA System Malfunction
TSM TASK 28-21-00-810-827-A
Fuel - L(R) Wing Tank Pumps 1, Power Supply (Normal) - C/B-1QA(2QA) Tripped
ESPM 2053210
AMM 28-21-00-710-001
Operational Test of the Wing-Tank Fuel Control
ASM 282101
3. Fault Confirmation
Subtask 28-21-00-710-097-A
A. Safety Precaution
WARNING: DO NOT CLOSE AN OPEN (TRIPPED) CIRCUIT BREAKER RELATED TO A FUEL-PUMP. IF YOU CLOSE THE CIRCUIT BREAKER, THERE IS A RISK:
  • OF FIRE OR OF AN EXPLOSION
  • OF DAMAGE TO THE AIRCRAFT WIRING AND STRUCTURE.
   (1) If you find the C/B-2QA has tripped (during a work step in this TSM TASK or a referenced out AMM TASK), you must:
     (a) Stop the initial work steps.
     (b) Do the TSM procedure, Fuel - L(R) Wing Tank Pumps 1, Power Supply (Normal) C/B- 1QA(2QA) Tripped (Ref. TSM TASK 28-21-00-810-827).
     (c) Replace (or do a repair of) all the unserviceable wiring and connections ESPM 2053210 before you continue.
     (d) Close the C/B-2QA.
     (e) Continue the initial work steps.
Subtask 28-21-00-710-057-A
B. Test
   (1) If necessary, do the job set-up of the Operational Test of the Wing Tanks Fuel Control AMM 28-21-00-710-001.
   (2) Push (in) the R TK PUMPS 1 P/BSW (14QA).
   (3) Examine the right wing-tank fuel-pump 1 symbol, on the FUEL system page, at the ECAM lower display unit.
   (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 Right Wing Tank Pump No. 1 (Inner) 22QA System Malfunction (Ref. TSM TASK 28-21-00-810-802).
NOTE: The amber LO is only shown when the signals that follow occur at the same time:
  • the contactor closed (on)
and
  • the right tank pump 1 low fuel pressure.
4. Fault Isolation
Subtask 28-21-00-810-057-B
A. Procedure
   (1) Do the initial checks as given in:

  • step (a), with a MULTIMETER - STANDARD

and/or

  • step (b), by substitution and replacement.
     (a) Do a check of the electrical circuits ASM 282101 as follows:
       1 At the panel (contactor box) 107VU, remove the contactor-18QA.
       2 At the contactor (relay) base 18QA-A, make sure that:

  • a ground is available at terminal Z (through the closed, de-energized, contacts of contactor-54QA, terminals 4 to 3)

  • 28VDC is available at terminal X, when the P/BSW-14QA is set to on (through the closed contacts B3 to B1).
       3 Replace all the unserviceable items.
       4 Make sure that the contactor-18QA removed in step 1_ is installed.
       5 Do the test given in Para. 3.B.
     (b) Swap (interchange) the items listed that follow, one at a time, with those from the left wing-tank fuel-pump 1 system where applicable:
  • the CNTOR-R WING TK PUMP 1 SPLY [18QA]
  • the CNTOR-R WING TK STBY SPLY, PUMP 1 [54QA]
  • the P/BSW-FUEL/R TK PUMPS/1 [14QA]
  • the RELAY-BUS 1/ESS. R TK PUMP 1 [64QA]
  • the P/BSW-EMER ELEC PWR/GEN1 LINE [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.B.
       2 If the fault is removed /cleared:
         a Replace all the unserviceable items.
         b Do the test given in Para. 3.B. for the left and right wing-tank fuel-pumps 1.
   (2) If the fault continues:
     (a) Do a check ASM 282101 of the aircraft wiring between:
  • the C/B-FUEL/PUMPS/1/R CTL AND L IND (4QA), terminal 2 and the RELAY-BUS 1/ESS. R TK PUMP 1 (64QA), terminal A2
  • the C/B-FUEL/PUMPS/1/R CTL AND L IND (4QA), terminal 2 and the RELAY-BUS 1/ESS. R TK PUMP 1 (64QA), terminal C1
  • the RELAY-BUS 1/ESS. R TK PUMP 1 (64QA), terminal A1 and the P/BSW-FUEL/R TK PUMPS/1 (14QA), terminal B3
  • the RELAY-BUS 1/ESS. R TK PUMP 1 (64QA), terminal X2 and the P/BSW-EMER ELEC PWR/SMOKE DRILL (13XU), terminal D1 the P/BSW-EMER ELEC PWR/SMOKE DRILL (13XU), terminal D3 and the aircraft ground at 2409VG
  • 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 P/BSW-FUEL/R TK PUMPS/1 (14QA), terminal B1 and the CNTOR-R WING TK PUMP 1 SPLY (18QA), terminal X
  • the CNTOR-R WING TK PUMP 1 SPLY (18QA), terminal Z and the CNTOR-R WING TK STBY SPLY PUMP 1 (54QA), terminal 4
  • the CNTOR-R WING TK STBY SPLY PUMP 1 (54QA), terminal 3 and the aircraft ground DC1 at 1176VT.
     (b) Repair all the unserviceable wiring and connectors ESPM 2053210.
     (c) Do the test given in Para. 3.B.
[Rev.8 from Aug 2018] 2026.04.04 04:28:34 UTC
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