IBM 6151 Maintenance And Service Manual page 287

Step 7
1.
Remove the last FRU you exchanged.
2. Install the original FRU.
3. Use the removal and replacement procedures in the section that
applies to the FRU and exchange the FRU that corresponds to
the next SRA in the SRN.
4. Ask the customer to run the failing application again.
DID THE SAME FAILURE OCCUR?
YES Go to "Step 6" on page 3-0080-6.
NO This completes the repair.
(6/88) Problem Isolation Charts 3-0080-7