Intercell XFR Valve Failure (Left Rear) - Open When Fuel Not Low Level

TASK 28-15-00-810-808-A
Intercell XFR Valve Failure (Left Rear) - Open When Fuel Not Low Level

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: EN50020, UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE FIRE OR AN EXPLOSION.

1. Possible Causes

ACTUATOR-TRANSFER VALVE, L REAR SPAR [11QP]
aircraft wiring
RELAY-L WING TK LOW LEVEL CHANNEL A (5QP) 103VU
RELAY-R WING TK LOW LEVEL CHANNEL B (6QP) 103VU
RELAY-L OR R REAR XFR VALVE OPEN LATCH (13QP) 103VU

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
ESPM 2053210
AMM 28-15-00-740-002	Functional (BITE) Test of the Intercell Transfer Valves
ASM 281501
AMM 28-15-51-000-002	Removal of the Actuator
AMM 28-15-51-400-002	Installation of the Actuator
AMM 28-46-00-740-001	Functional (BITE) Test

3. Fault Confirmation
Subtask 28-15-00-865-060-A ** ON A/C NOT FOR ALL

A. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FUEL/FQI/CHAN/1	1QT	A13
121VU	FUEL/FQI/CHAN/2	2QT	M27

Subtask 28-15-00-710-057-A ** ON A/C NOT FOR ALL

B. Test
(1) Read the:
(a) Paragraph titled Intermittent fault (Ref. TSM, 00-INTRO, 7.F(2)(b)2_).
(b) Technical Follow-Up (Ref. TFU 28.15.00.003).
(2) Do the Functional BITE Test (of the FLSS) AMM 28-46-00-740-001.
(a) Examine the FLSS STATUS page.
Look for one (or more) of the messages that follow:

L LO LEVEL SENSOR 16QJ1
R LO LEVEL SENSOR 15QJ2
FLSCU1 7QJ
FLSCU2 9QJ.

(b) If a message(s) listed (in the step before):

is not shown, do step (3)
is shown, trouble shoot the identified LRU(s) before you do step (3).

(3) Do the Functional BITE Test of the Intercell Transfer Valves AMM 28-15-00-740-002.

NOTE: The COMMAND FLSS BITE option does not test the intercell transfer valves (ICTVs).

NOTE: The ICTVs are motor driven and the electrical power for these circuits is supplied from 801PP, 28VDC, ESS BUS/SHEDDABLE ASM 281501. The ICTVs will not operate on battery power

(a) Examine the FLSS STATUS page.
Look for the (left wing rear ICTV) message XFR VALVE 28QM/71QM/11QP.
(b) If the message:

is not shown, go to step (4)
is shown, do Para. 4.A.

(4) AIRBUS recommends:
(a) If the two functional tests (in steps (2) and (3)) show NO FAULTS, the FLSCU-1 7QJ and the FLSCU-2 9QJ are not replaced.
(b) No more work steps are necessary.

4. Fault Isolation
Subtask 28-15-00-810-057-A ** ON A/C NOT FOR ALL

A. Procedure
(1) Get access to the ACTUATOR-TRANSFER VALVE, L REAR SPAR (11QP) AMM 28-15-51-000-002.
(2) Disconnect the electrical connector 11QP-A from the ACTUATOR-TRANSFER VALVE, L REAR SPAR (11QP).
(3) With a MULTIMETER - STANDARD check to see if 28VDC is available at pin B of the actuator electrical supply cable connector ASM 281501.
(4) If the 28VDC is available check/replace the ACTUATOR-TRANSFER VALVE, L REAR SPAR [11QP] , AMM 28-15-51-000-002, and AMM 28-15-51-400-002.
(a) When the actuator is removed from the aircraft make sure that the transfer valve drive shaft and valve are free to rotate.
(b) Repair/replace any unserviceable items found in (a).
(5) If the 28VDC is not available at pin B of the actuator electrical supply cable connector 11QP-A.
(a) Check with a multimeter to make sure that 28VDC is available at:

terminal A2, RELAY-L WING TK LOW LEVEL CHANNEL A (5QP)
terminal X1, RELAY-L WING TK LOW LEVEL CHANNEL A (5QP).

(b) If the 28VDC is not available do a wiring check ASM 281501 of the aircraft wiring between the RELAY-L WING TK LOW LEVEL CHANNEL A (5QP) terminals A2, X1, and the C/B-FUEL/XFR VALVE 1/WING/L (1QP).
(c) Repair all the unserviceable wiring and connectors ESPM 2053210.
(d) Check with a multimeter to make sure that 28VDC is available at:

terminal A2, RELAY-R WING TK LOW LEVEL CHANNEL B (6QP)
terminal X1, RELAY-R WING TK LOW LEVEL CHANNEL B (6QP).

(e) If the 28VDC is not available do a wiring check ASM 281501 of the aircraft wiring between the RELAY-R WING TK LOW LEVEL CHANNEL B (6QP) terminals A2, X1, and the C/B-FUEL/XFR VALVE 1/WING/R (2QP).
(f) Repair all the unserviceable wiring and connectors.
(6) Do the test given in Para 3.B.
(7) If the fault continues, check/replace the RELAY-L WING TK LOW LEVEL CHANNEL A (5QP) 103VU.
(8) Do the test given in Para 3.B.
(9) If the fault continues check/replace the RELAY-R WING TK LOW LEVEL CHANNEL B (6QP) 103VU.
(10) Do the test given in Para 3.B.
(11) If the fault continues check/replace the RELAY-L OR R REAR XFR VALVE OPEN LATCH (13QP) 103VU.
(12) Do the test given in Para 3.B.
(13) If the fault continues do a wiring check ASM 281501 of the aircraft wiring between:

the pin B, ACTUATOR-TRANSFER VALVE, L REAR SPAR (11QP) and the terminal B1, RELAY-R WING TK LOW LEVEL CHANNEL B (6QP)
the terminal B2, RELAY-R WING TK LOW LEVEL CHANNEL B (6QP) and the terminal A1, RELAY-L WING TK LOW LEVEL CHANNEL A (5QP)
the terminal X2, RELAY-L WING TK LOW LEVEL CHANNEL A (5QP) and the terminal A, RELAY-L OR R REAR XFR VALVE OPEN LATCH (13QP)
the terminal X2, RELAY-R WING TK LOW LEVEL CHANNEL B (6QP) and the terminal B, RELAY-L OR R REAR XFR VALVE OPEN LATCH (13QP)
the terminal 1, RELAY-L OR R REAR OPEN LATCH (13QP) and the pin 5A, connector AA, FLSCU-1 (7QJ)
the terminal 3, RELAY-L OR R REAR OPEN LATCH (13QP) and the pin 5A, connector AA, FLSCU-2 (9QJ)
the pin 1A, connector AA, FLSCU-1 (7QJ) and the C/B-FUEL/XFR VALVE 1/WING/L (1QP)
the pin 1A, connector AA, FLSCU-2 (9QJ) and the C/B-FUEL/XFR VALVE 1/WING/R (2QP).

(14) Repair all the unserviceable wiring and connectors.
(15) Do the test given in Para 3.B.

[Rev.8 from Aug 2018] 2026.04.04 04:39:27 UTC