- 28VDC is available at terminal X, when the P/BSW-15QA is set to on (through the closed contacts B3 to B1).
3 Replace all the unserviceable items.
_ 4 Make sure that the contactor-19QA 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 2 system:
- the CNTOR-L WING TK PUMP 2 SPLY (19QA)
- the P/BSW-FUEL/L TK PUMPS/2 (15QA).
「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 A224
May 01/04R CES
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 2.
(2) If the fault continues:
(a) Do a check (Ref. ASM 28-21/02) of the aircraft wiring between:
- the C/B-FUEL/PUMPS/2/L CTL AND R IND (9QA), terminal 2 and the P/BSW-FUEL/L TK PUMP/2 (15QA), terminal B3
- the P/BSW-FUEL/L TK PUMP/2 (15QA), terminal B1 and the CNTOR-L WING TK PUMP 2 SPLY (19QA), terminal X
- the CNTOR-L WING TK PUMP 2 SPLY (19QA), terminal Z and the aircraft ground DC2 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 A225
May 01/04R
CES
TASK 28-21-00-810-812
Fuel Pumps - Right Wing Tank Fuel Pump No. 2 Contactor Control Failure
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______ R WARNING : WHEN YOU DO WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST
_______
R EQUIPMENT THAT IS APPROVED (REFER TO INTERNATIONAL OR NATIONAL
R SPECIFICATIONS FOR INTRINSICALLY SAFE TEST EQUIPMENT, E.G. EN50-020,
R UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE
R FIRE OR AN EXPLOSION.
1. Possible Causes
_______________
- CNTOR-R WING TK PUMP 2 SPLY (20QA)
- P/BSW-FUEL/R TK PUMPS/2 (16QA)
- 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
-------------------------------------------------------------------------------
28-21-00-810-804 Fuel Pumps - Right Wing Tank Fuel Pump No. 2 (Outer)
26QA System Malfunction
ESPM 20-00-00
AMM 28-21-00-710-001 Operational Test of the Wing-Tank Fuel Control
ASM 28-21/02
3. Fault Confirmation
__________________
A. Test
(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 R TK PUMPS 2 P/BSW (16QA).
(3) Examine the right 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 A226
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 Right Wing Tank Pump No. 2 (Outer) 26QA System Malfunction (Ref. TASK 28-21-00-810-804).
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 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.
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