IBM Power System Series Manual page 54

Figure 39: Fastening the screws for the disk drive backplane
3. Replace all the fans in the disk drive backplane.
a) Ensure that the fan handle (A) is open as shown in the following figure.
b) Hold on to the fan handle and by using your hand to support the bottom of the fan, push the fan
into its slot as shown in the following figure.
c) Push the fan handle in the direction that is shown in the following figure.
d) Push against the left front of the blue touch point latch (B) with your thumb and then slightly pull
the latch at (C) with your index finger. This action opens the latch.
e) Continue to push in the lever with your thumb until the latch is fully seated at (C).
50 Power Systems: Temple's Zeppelin procedures for install, remove, replace