The failing component is in the PCI I/O backplane of an I/O unit.

1. Are you working from the serviceable event view and a card location is listed with this failing item, or do you already know the unit or feature type where the failure is?
   • Yes: The listed card location is where the error is located. Continue with the next step.
   • No: Record the bus number value, BBBB, in word 7 of the reference code. Word 7 of the reference code allows you to determine the correct bus number, bus type, multi-adapter bridge number, multi-adapter bridge function number, and logical card number from the Direct Select Address (DSA), see DSA translation. "DSA translation" is also available in the service guide for the system unit. Continue with the next step.

2. Use the following table to determine the part number for the field replaceable unit (FRU):

   CCIN or FFC	Type and model	Part number	Description	Location code
   	5790, 7311-D11	80P6626	I/O backplane	Un-P1
   	0595, 5095, 7311-D20	39J0515	I/O backplane	Un-P1
   	5796, 7314-G30	10N7677	I/O backplane	Un-P1
   	5094	39J3058	I/O backplane	Un-CB1

This ends the procedure.