Fuel Pumps - Center Tank Fuel Pump No. 2 (Right Side) Contactor Control Failure (Manual Control)

TASK 28-21-00-810-818-A
Fuel Pumps - Center Tank Fuel Pump No. 2 (Right Side) Contactor Control Failure (Manual Control)

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

WARNING: DO NOT CLOSE OR RESET:

AN OPEN (TRIPPED) MECHANICAL CIRCUIT BREAKER
A TRIPPED GFI

THAT IS RELATED TO A FUEL PUMP. YOU MUST DO THE TROUBLESHOOTING OF THE FAULT BEFORE YOU CLOSE OR RESET AN OPEN CIRCUIT BREAKER OR GFI. IF YOU CLOSE THE CIRCUIT BREAKER, THERE IS A RISK OF:

FIRE OR EXPLOSION
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-GFI CTR TK PUMP 2 SUPPLY [70QA]
PUMP-FUEL NO 2, CTR TK [38QA]
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	1	MULTIMETER - STANDARD

B. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 28-21-00-810-814-A	Fuel Pumps - Center Tank Fuel Pump No. 2 (Right Side) 38QA System Malfunction
TSM TASK 28-21-00-810-829-A	Fuel - Loss of Power supply to the Center Tank Pump 1(2)
AMM 12-11-28-650-004	Pressure Refuel with Manual Control
ESPM 2053210
AMM 28-18-00-710-801	Operational Check of Center-Tank Fuel-Pump GFI
AMM 28-21-00-040-002	Deactivation of the Center Tank
ASM 282103
AMM 28-25-00-869-001	Fuel Transfer
AMM 31-60-00-860-001	EIS Start Procedure

3. Fault Confirmation
Subtask 28-21-00-710-101-C ** ON A/C NOT FOR ALL

A. Safety Precaution

WARNING: DO NOT CLOSE OR RESET:

AN OPEN (TRIPPED) MECHANICAL CIRCUIT BREAKER
A TRIPPED GFI

THAT IS RELATED TO A FUEL PUMP. YOU MUST DO THE TROUBLESHOOTING OF THE FAULT BEFORE YOU CLOSE OR RESET AN OPEN CIRCUIT BREAKER OR GFI. IF YOU CLOSE THE CIRCUIT BREAKER, THERE IS A RISK OF:

FIRE OR EXPLOSION
DAMAGE TO THE AIRCRAFT WIRING AND STRUCTURE.

(1) If you find the C/B-30QA or the GFI-70QA 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 Fuel - Loss of Power supply to the Center Tank Pump 1(2) procedure (Ref. TSM TASK 28-21-00-810-829).
(c) Replace (or do a repair of) all the unserviceable wiring and connections ESPM 2053210 before you continue.
(d) Close the C/B-30QA or GFI-70QA.
(e) Continue the initial work steps.

Subtask 28-21-00-710-067-B ** ON A/C NOT FOR ALL

B. Test
(1) If necessary, do the EIS start procedure (ECAM only) AMM 31-60-00-860-001.
(a) On the ECAM control panel, push (in) the FUEL P/BSW.
(b) Make sure that the FUEL page shows on the ECAM lower display unit.
(2) Make sure that the center tank contains more than 250 kg (560 lb) of fuel. Refuel AMM 12-11-28-650-004 or transfer fuel AMM 28-25-00-869-001, if necessary.
(3) Make sure that the CTR TK MODE SEL P/BSW (48QA) white MAN legend is on. If necessary, release (out) the CTR TK MODE SEL P/BSW (48QA) to set the center tank fuel pumps control to manual mode.
(4) Push (in) the CTR TK PUMP 2 P/BSW (34QA).
(5) Examine the center-tank right side fuel-pump No. 2 symbol, on the FUEL system page, at the ECAM lower display unit.
(6) 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 Center Tank Pump No. 2 (Right Side) 38QA System Malfunction (Ref. TSM TASK 28-21-00-810-814).

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 2 low fuel pressure.

4. Fault Isolation
Subtask 28-21-00-810-067-C ** ON A/C NOT FOR ALL

A. Procedure
(1) Do the operational test of the GFI 70QA AMM 28-18-00-710-801.
(a) If there is a fault with the CNTOR-GFI CTR TK PUMP 2 SUPPLY [70QA] , replace it.

or
(b) If MMEL conditions apply, deactivate the PUMP-FUEL NO 2, CTR TK [38QA] AMM 28-21-00-040-002. (Ref. MMEL 28-21-02 Center Tank Fuel Pump).
(2) At the panel 107VU (Contactor box) 107VU, do a visual inspection of the GFI 70QA.
(a) If the GFI 70QA has tripped, go to step (4).
(b) If the GFI 70QA is not tripped, do the steps that follow.
(3) Do the initial checks as given in:

step (a), with a MULTIMETER - STANDARD

step (b), by substitution and replacement.

(a) Do a check of the electrical circuits ASM 282103 as follows:
1 At the panel (contactor box) 107VU, remove the CNTOR-GFI CTR TK PUMP 2 SUPPLY [70QA] .
2 At the CNTOR-GFI CTR TK PUMP 2 SUPPLY [70QA] , make sure that:

a ground is available at terminal X2
28VDC is available at terminal X1, when the P/BSW-34QA is set to ON (through the closed contacts B3 to B1).

(b) If the step 2_ is satisfactory:
1 Replace the CNTOR-GFI CTR TK PUMP 2 SUPPLY [70QA]
2 Do the operational test of the GFI 70QA AMM 28-18-00-710-801.
3 Do the test given in Para. 3.B.
(c) If the step 2_ is not satisfactory
1 Replace all the unserviceable items(where applicable)
2 Install the CNTOR-GFI CTR TK PUMP 2 SUPPLY [70QA] removed in step 1.
3 Do the test given in Para. 3.B.
(d) Interchange and test the items follow, one at a time, with those from the center-tank fuel-pump 1 system:

the CNTOR-GFI CTR TK PUMP 2 SUPPLY [70QA]
the RELAY-CTR TK AUTO CONTROL, PUMP 2 [42QA]
the P/BSW-FUEL/CTR TK/PUMP 2 [34QA] .

1 Do the test given in Para. 3.B.
2 If the fault does not continue.
a Replace all the unserviceable items.
b Do the test given in Para. 3.B. for the left (1) and right (2) center-tank fuel-pumps.
(4) If the fault continues:
(a) Do a check ASM 282103 of the aircraft wiring between:

the C/B-FUEL/CTR TK/PUMPS 1 & 2/CTL & IND (32QA), terminal 2 and the P/BSW-FUEL/CTR TK/PUMP 2 (34QA), terminal B3
the P/BSW-FUEL/CTR TK/PUMP 2 (34QA), terminal B1 and the RELAY-CTR TK AUTO CONTROL, PUMP 2 (42QA), terminal B
the RELAY-CTR TK AUTO CONTROL, PUMP 2 (42QA), terminal 3 and the CNTOR-GFI CTR TK PUMP 2 SUPPLY [70QA] , terminal X1
the CNTOR-GFI CTR TK PUMP 2 SUPPLY [70QA] , terminal X2 and the aircraft ground DC2 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 04:28:36 UTC