Fault Message:

ACPC SSPC PWR CARD10(A23)/R AFT PMP

Fault Code:

2451329ACP

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) 10
• Right Aft Boost Pump
• AC Power Center (ACPC) (A54)
• Associate 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 FUEL CONTROL PANEL, SLC #4 and THROTTLE QUADRANT
• If the breaker is always tripping without CAIMS message, check for a short circuit between the RIGHT AFT BOOST PUMP and the SSPC #10

1. Swap SSPC 10 with SSPC 15 and monitor the AVIONICS FAN.

   1. If system checks are good, replace SSPC 10 card and do close out.
   2. If fault remains, continue with next step.

2. Disconnect the R AFT BOOST PUMP connector B23P1 and remove the SSPC 10 card. Perform continuity check between the connections that follows:

   From	To	Result
   SSPC 10 P420-25	B23P1-A
   SSPC 10 P420-18	B23P1-B
   SSPC 10 P420-31	B23P1-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 10 P420-25	Ground
   SSPC 10 P420-18	Ground
   SSPC 10 P420-31	Ground
   SSPC 10 P420-25	SSPC 10 P420-18
   SSPC 10 P420-25	SSPC 10 P420-31
   SSPC 10 P420-18	SSPC 10 P420-31

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

4. Disconnect connector A54P1 and repeat step 3.

   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.