IBM Power System 8247-42L Manual page 34

Figure 15. Removing the front baffle bracket
23. If your system is an 8286-41A, you must remove the rear air baffle and rear air baffle guide so that
they can be installed on the replacement system backplane during the replace procedure. If your
system is not an 8286-41A, skip this step.
a. Remove the three screws that secure the top cover attach bracket by using a T-10 Torx driver.
Then, remove the top cover attach bracket, as shown in Figure 16 on page 17.
16
System backplane