The multi-adapter bridge detected a problem with a connection to a PCI adapter that it controls either in a physical card location or embedded in a FRU.

The problem is either in the bus between the multi-adapter bridge and the adapter, or with the card slot. The card location might or might not have an installed card.

1. Are you working from the serviceable event view and a card location is listed with this FRU?
   • 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 server. Continue with the next step.
   • Yes: Then the listed card location is where the error is located. Continue with the next step.

2. The failing component is the FRU containing the physical or embedded card slot that is controlled by the multi-adapter bridge. Identify the system model, I/O unit, or machine type that is indicated by the location in the serviceable event view, or by using the bus number.

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

   Table 1. Failing component service information for MASBUS

   CCIN or FFC	Type and model	Part number	Description	Location code
   	9406-MMA, 9117-MMA	42R7352	I/O backplane	Un-P1
   	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.