Fault Message:

RH CTR XFER PUMP/PRESS SW/WRG

Fault Code:

2844620PK

Associated CAS:

CTR FUEL XFER FAIL
(Caution)

CTR XFER FAULT
(Advisory)

R CNTR TRNS PMP/PRES SWITCH FAULT shows on the CAIMS PMAT when the conditions that follow occur:

• The Right Center Transfer-Pump command is on
• The Right Center Transfer-Pump Pressure-indication is low

OR

• The Right Center Transfer-Pump command is off
• The Right Center Transfer-Pump Pressure-indication is high

NOTE: If both of the CAIMS messages R CNTR TRNS PMP/PRES SWITCH FAULT and R CNTR TRNS PUMP LMS/WRG FAULT show, troubleshoot with R CNTR TRNS PMP PRES SWITCH/WRG FLT page first.

• Right Center Transfer-Pump Pressure-Switch (S20)
• Right Center Transfer-Pump Cartridge (B33)
• Fuel Management and Quantity Gauging Computer (FMQGC) (A47)
• Right Center Transfer-Pump Canister
• Associated Wiring

Advisory Wire/Service Bulletin:

• AW700-45-0065 - CAIMS Nuisance Fault Messages

Forum Articles/Infoservice/Newsletter: None

Other names used for Right center TRANSFER PUMP command signals:

• RH XFER L ENG RUN
• R XFER REQUEST

Synoptic indication to be confirmed in a simulator or an aircraft.

1. Go to CENTER TRANSFER TEST page via PMAT to turn on Right center Transfer Pump.
2. Check Pump Status/Active Faults data as table below:

   	Reference	Indication
   Pump Status	RIGHT XFER PUMP PRESSURE	Not Low (Hi)
   Active Faults	R XFER PRESSURE SWITCH FAIL STATUS	Normal

   1. If pressure is high, go to step 13.
   2. If pressure is normal, continue with next step.

3. Does fuel quantity increase in the right wing tank?

   1. If YES (fuel is transferring), go to step 10.
   2. If NO, continue with next step.

4. Measure for 118 ±3 VAC at Right center Transfer Pump connector B33P1 as follows:

   Right center Transfer Pump	Expected Result	Result
   B33P1-A	118 ±3 VAC
   B33P1-B	118 ±3 VAC
   B33P1-C	118 ±3 VAC

   1. If the power is not good, go to step 6.
   2. If the power is good, continue with next step.

5. Swap right center transfer-pump cartridge with left center transfer-pump cartridge.

   1. If system checks are good, replace right center transfer-pump cartridge and do close out.
   2. If NO, continue with next step.

6. Check R CTR XFER PUMP command signals from the FMQGC to EMS CDU 1 and 2 (Two signal grounds at: A94P2-67 and A91P2-67).

   1. If the ground signal exists, go to step 10.
   2. If the ground signal does not exist, continue with next step.

7. Perform wiring check between FMQGC to Fuel Panel as follows:

   From	To	Result
   A47AP1-J14	AP5P2-4
   A47DP1-J13	AP5P2-9

   1. If wiring checks are not good, repair defective wiring as required and do close out.
   2. If wiring checks are good, continue with next step.

8. Perform wiring check between Fuel Panel to EMS CDU 1 and EMS CDU 2 as follows:

   From	To	Result
   AP5P2-3	A94P2-67
   AP5P2-2	A91P2-67

   1. If wiring checks are not good, repair defective wiring as required and do close out.
   2. If wiring checks are good, continue with next step.

9. Perform wiring check inside the Fuel Panel as follows:

   From	To	Result
   AP5P2-2	AP5P2-9
   AP5P2-3	AP5P2-4

   1. If wiring checks are not good, repair defective wiring as required and do close out.
   2. If wiring checks are good, continue with next step.

10. Swap right center transfer pump pressure switch with left center transfer pump pressure switch.

    1. If system checks are good, replace right center transfer pump pressure switch and do close out.
    2. If fault remains, continue with next step.

11. Replace FMQGC. Is fault gone?

    1. If YES, do close out.
    2. If NO, continue with next step.

12. Replace right center transfer pump transfer canister.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

13. Turn off Right Center Transfer Pump.
14. Check Pump Status/Active Faults data as table below:

    	Reference	Indication
    Pump Status	RIGHT XFER PUMP PRESSURE	Low
    Active Faults	R XFER PRESSURE SWITCH FAIL STATUS	Normal

    1. If pressure is low, do close out.
    2. If pressure is normal, repeat step 7.

15. Do close out.