Fault Message:

ACPC SSPC PWR CARD11(A24)/R XFR PMP

Fault Code:

2451330ACP

Associated CAS:

ELEC SYS FAULT
(Advisory)

The AC Power Center (ACPC) Solid State Power Converter (SSPC) power card has detected a failure with the initialization of the AC SSPCs, the control logic circuitry and/or the load.

• AC Power Center (ACPC) Solid−State Power Controller (SSPC) 11
• Right Center Transfer Pump
• AC Power Center (ACPC) (A54)
• Associated Wiring

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

• If the pump is inoperative without CAIMS message and breaker is IN, check wires between FMQGC, FUEL CONTROL PANEL and EMS CDU 1 and 2
• If the breaker is always tripping without CAIMS message, check for a short circuit between the RIGHT TRANSFER PUMP and the SSPC #11

1. Swap SSPC 11 with SSPC 10 and monitor the R AFT BOOST PUMP.

   1. If system checks are good, replace SSPC 11 card and do close out.
   2. If fault remains, continue with next step.

2. Disconnect the R CENTER TRANSFER-PUMP connector B33P1 and remove the SSPC 11 card. Perform continuity check between the connections that follows:

   From	To	Result
   SSPC 11 P430-25	B33P1-A
   SSPC 11 P430-18	B33P1-B
   SSPC 11 P430-31	B33P1-C

   1. If there is no continuity, repair the defective wiring as required and do close out.
   2. If there is continuity, continue with next step.

3. Perform continuity check between the connections that follows:

   From	To	Result
   SSPC 11 P430-25	Ground
   SSPC 11 P430-18	Ground
   SSPC 11 P430-31	Ground
   SSPC 11 P430-25	SSPC 11 P430-18
   SSPC 11 P430-25	SSPC 11 P430-31
   SSPC 11 P430-18	SSPC 11 P430-31

   1. If there is no continuity, replace R CENTER TRANSFER-PUMP and do close out.
   2. If there is continuity, continue with next step.

4. Disconnect connector A54P1. Repeat step 4.

   1. If there is no continuity, repair aircraft wiring interface as required and do close out.
   2. If continuity, continue with next step.

5. Replace ACPC.
6. Do close out.