- amber LO, do the TSM procedure Center Tank Pump No. 1 (Left Side) 37QA System Malfunction (Ref. TASK 28-21-00-810-813).
NOTE : The amber LO is only shown when the signals that follow occur
____
at the same time:
- the contactor closed (on) and
- the center tank pump 1 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 28-21/03) as follows:
1 At the panel (contactor box) 107VU, remove the contactor-35QA.
_
2 At the contactor (relay) base 35QA-A, make sure that:
_ - a ground is available at terminal Z
「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 A252
201-299, 401-499, Aug 01/05 CES
- 28VDC is available at terminal X, when the P/BSW-33QA is set to on (through the closed contacts B3 to B1).
3 Replace all the unserviceable items.
_
4 Make sure that the contactor-35QA 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 center-tank fuel-pump 2 system:
- the CNTOR-CTR TK PUMP 1 SPLY (35QA)
- the RELAY-CTR TK AUTO CONTROL, PUMP 1 (41QA)
- the P/BSW-FUEL/CTR TK/PUMP 1 (33QA).
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 (1) and right
_ (2) center-tank fuel-pumps.
(2) If the fault continues:
(a) Do a check (Ref. ASM 28-21/03) of the aircraft wiring between:
- the C/B-FUEL/CTR TK/PUMPS 1 & 2/CTL & IND (31QA), terminal 2 and the P/BSW-FUEL/CTR TK/PUMP 1 (33QA), terminal B3
- the P/BSW-FUEL/CTR TK/PUMP 1 (33QA), terminal B1 and the RELAY-CTR TK AUTO CONTROL, PUMP 1 (41QA), terminal B
- the RELAY-CTR TK AUTO CONTROL, PUMP 1 (41QA), terminal 3 and the CNTOR-CTR TK PUMP 1 SPLY (35QA), terminal X
- the CNTOR-CTR TK PUMP 1 SPLY (35QA), 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.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page A253
201-299, 401-499, Aug 01/05 CES
TASK 28-21-00-810-818
Fuel Pumps - Center Tank Fuel Pump No. 2 (Right Side) Contactor Control Failure (Manual Control)
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
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-CTR TK PUMP 2 SPLY (36QA)
- RELAY-CTR TK AUTO CONTROL, PUMP 2 (42QA)
- P/BSW-FUEL/CTR TK/PUMP 2 (34QA)
- 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 -------------------------------------------------------------------------------
28-21-00-810-814 Fuel Pumps - Center Tank Fuel Pump No. 2 (Right Side)
38QA System Malfunction
ESPM 20-00-00
AMM 12-11-28-650-004 Pressure Refuel with Manual Control
AMM 28-25-00-869-001 Fuel Transfer
AMM 31-60-00-860-001 EIS Start Procedure
ASM 28-21/03
3. Fault Confirmation
__________________
A. Test
(1) If necessary, do the EIS start procedure (ECAM only) (Ref. AMM TASK 31-60-00-860-001).
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