IBM Power System POWER7 Series Common Service Procedures page 142

Figure 63. PCI adapter cassette cover removed
b. Remove the adapter from the cassette by doing the following steps:
1) Unlock the adapter retainers by rotating the retainer clip (A) into the horizontal position. See
Figure 64 on page 129.
Notes:
v The edge of the adapter located at the end of the cassette that contains the cassette handles
is called the adapter tailstock.
v Two retainers are located at the top of the cassette, along the top edge of the adapter. Two
more retainers are located at the edge of the cassette opposite of the adapter tailstock.
v When the retainer clip is in the horizontal position, the adapter retainers are unlocked and
can slide away from the card.
v If the corner support retainer is used, unlock it, and then slide the corner support retainer
away from the card.
2) Push the adapter retainers (B) away from the adapter.
3) Unlock the adapter tailstock clamp (C).
4) Rotate the adapter out of the cassette by grasping the edge of the adapter opposite the
tailstock, and then firmly rotate the adapter toward the bottom of the cassette.
5) Lift the adapter out of the tailstock retaining channel.
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