Fuel-Crossfeed Valve status is not available or is shown incorrectly on the ECAM FUEL page

TASK 28-23-00-810-804-A
Fuel-Crossfeed Valve status is not available or is shown incorrectly on the ECAM FUEL page

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-FUEL CROSSFEED VALVE [5QE]
aircraft wiring
SDAC-1 [1WV1]
SDAC-2 [1WV2]

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 28-23-00-810-801-A	Fuel-Crossfeed Valve Does Not Open (Close) or Opens (Closes) Slowly
TSM TASK 28-23-00-810-802-A	Fuel-Crossfeed Valve P/BSW-4QE, ON and/or OPEN legends do not come on
ESPM 2052210
ESPM 2053210
CMM 280111
AMM 28-23-00-720-001	Operational Test of Crossfeed Valve Using Individual Motors: ...
ASM 282301
AMM 28-23-51-000-001	Removal of the Crossfeed Valve Actuator
AMM 28-23-51-400-001	Installation of the Crossfeed Valve Actuator
AMM 31-55-34-000-001	Removal of the SDAC
AMM 31-55-34-400-001	Installation of the SDAC

3. Fault Confirmation
Subtask 28-23-00-700-052-A

A. Test
(1) Do the procedure for the operational test of the crossfeed valve using individual motors AMM 28-23-00-720-001.

NOTE: During the operational test when the C/B-2QE is set to open, the OPEN legend of the P/BSW-4QE will not come on. This is because the C/B-2QE also supplies 28VDC to the related lamp control circuit in the BOARD-ANN LT TEST & INTFC (6LP).

(2) If, during the test of the crossfeed system:

the crossfeed valve (10QM) does not open and/or close, do the procedure (Ref. TSM TASK 28-23-00-810-801)
the ON and/or the OPEN legends of the P/BSW-4QE do not come on, do the procedure (Ref. TSM TASK 28-23-00-810-802)
the crossfeed valve status (symbol), relative to the P/BSW-4QE position (command) and the valve (see/feel indicator) position, is not shown correctly on the FUEL page, do the Para. 4.A.

4. Fault Isolation
Subtask 28-23-00-810-053-A

A. Procedure
(1) Do a check of the actuator-5QE as follows:

NOTE: This step is necessary because although the actuator crossfeed valve 5QE see/feel indicator has moved to the open (closed) position, the internal position indication microswitch OPEN (CLOSED) contacts and/or the related wiring can be unserviceable.

(a) Disconnect the connector 5QE-A from the actuator receptacle R1.

NOTE: The text reference to R1 relates to one of the actuator electrical receptacles and is etched onto the gearbox housing.

(b) Monitor the actuator-5QE see/feel indicator and make a record of its position.
(c) With a MULTIMETER - STANDARD, do a continuity check ESPM 2052210 of the actuator internal position indication microswitches ASM 282301 as follows:
1 If the actuator see/feel indicator in step (b) was:
a In the closed position
At the actuator receptacle R1 do a check for:

continuity between the pins B and E
open circuit between the pins D and E.

b In the open position
At the actuator receptacle R1 do a check for:

open circuit between the pins B and E
continuity between the pins D and E.

NOTE: The multimeter reading for continuity should be less than 1 ohm CMM 280111.

(d) Push (in) or release (out) the P/BSW-4QE to change the actuator position.

NOTE: This is done with motor 2 supplied through the connector 5QE-B that is still connected to receptacle R2.

(e) Do the step (d) again for the opposite condition.
(f) If the actuator-5QE position indication microswitches:

do not pass all the tests given in step (c), replace the ACTUATOR-FUEL CROSSFEED VALVE [5QE] AMM 28-23-51-000-001 and AMM 28-23-51-400-001
pass all the tests given in step (c), are serviceable, do step (2).

(2) If the fault continues, do a check ESPM 2052210 of the aircraft wiring ASM 282301 between:

The connector 5QE-A, pin D and the SDAC-1, rack connector 1WV1-A, pin 13H
The connector 5QE-A, pin D and the SDAC-2, rack connector 1WV2-A, pin 13H
The connector 5QE-A, pin B and the SDAC-1, rack connector 1WV1-A, pin 14H
The connector 5QE-A, pin B and the SDAC-2, rack connector 1WV2-A, pin 14H.

(a) If the wiring is not correct:

Repair or replace the unserviceable wiring and connectors ESPM 2053210.
Do the test in Para. 3.A.
If the fault continues, do step (b).

(b) If the wiring is correct:

Replace the applicable SDAC-1 [1WV1] or SDAC-2 [1WV2] , AMM 31-55-34-000-001 and AMM 31-55-34-400-001.

(3) If the fault continues, trouble shoot the ECAM display system (Ref. TSM 31-00-00).

[Rev.8 from Aug 2018] 2026.04.04 04:39:36 UTC