IBM Power System 9008-22L Manual page 52

CAUTION: A hot surface nearby. (L007)
3. Carefully grasp the adapter (B) by its top edge or tailstock, and remove the adapter from the slot.
Attention: A pin on the tailstock of the adapter resembles a removable screw. Do not remove
this pin. It is required for correct alignment and seating.
Figure 25. Removing a PCIe adapter from the 9008-22L, 9009-22A, or 9223-22H system
4. Place the removed adapter on an approved ESD surface.
38 Power Systems: PCIe adapters for the 9008-22L, 9009-22A, or 9223-22H